Document:

Exhibit 4.6

From:             Grange Nominees Ltd
                  Account CP2698
                  PO Box 116
                  Rue du Commerce
                  Les Banques
                  St Peter Port
                  Guernsey GY1 3UZ

To:               Gentia Software plc
                  Tuition House
                  St. George's Road
                  Wimbledon
                  London SW19 4EU

                                                               9th December 1999

Dear Sirs:

1.       AMOUNT

         We are pleased to make available to you a loan in the principal sum of
         $300,000 on the terms and conditions of this letter. The money shall be
         paid into an account in the name of Gentia Software plc at Barclays
         Bank Plc account number 20684058, sort code 20-65-63. Payment shall at
         our option be made in US dollars or in the sterling equivalent.

2.       REPAYMENT

         You will repay the loan together with interest on it at any time
         forthwith on demand.

3.       INTEREST

         The principal amount of the loan outstanding from time to time will
         carry interest at the rate of two per cent (2%) per annum above one
         month U.S. dollar L.I.B.O.R. as varied from time to time accruing daily
         and payable quarterly in arrears at the end January, April, July and
         October in each year. However, if you default in the payment or
         repayment on the due date of any sum from time to time due under this
         letter or if the provisions of clause 4 are not complied with in full,
         interest will accrue on a daily basis (payable on demand) on the amount
         in respect of which default has been made from the date of default
         until actual payment (both before and after judgment) at the rate of
         five per cent (5%) per annum above one month U.S. dollar L.I.B.O.R.

4.       SECURITY

         As security for your obligations to us under this loan you and your
         subsidiaries shall enter into a composite guarantee and debenture (in a
         form satisfactory to us) with us within 7 days of the date of this
         letter (the "Security") and provide us with a copy of your and your
         subsidiaries board minutes approving your entry into the Security (all
         in a form satisfactory to us).
<PAGE>

5.       CONVERSION FROM DEBT TO EQUITY

         On demand by us for the repayment of the loan you will forthwith agree
         the terms upon which the loan can at our election be converted into
         American Depository Shares ("ADS") of the Company with such ADSs being
         (1) evidenced by American Depository Receipts, (2) registered under the
         United States Securities Act of 1993 (as amended) and (3) listed on the
         NASDAQ National Market. Each ADS shall represent one ordinary share,
         par value 15p of the Company and for these purposes the deemed market
         value of each share shall be $4.625.

6.       SET OFF

         You will make all payments under or in respect of this facility for
         value on the due date in US dollars to us at such account as we may in
         our sole discretion nominate and from time to time instruct you in
         writing. If any payment becomes due on a day which is not a day on
         which banks are generally open for business in London, the due date of
         such payment will be extended to the next business day. You will make
         all payments under or in respect of this facility without set-off or
         counterclaim and free and clear of any withholding or deduction for or
         on account of tax, save as may be required by law.

7.       MANDATORY PREPAYMENT

         Notwithstanding the above provisions of this letter, the loan and all
         interest on it will become due and payable or repayable forthwith on
         demand by us if (1) you fail to pay any sum under this letter within
         three business days of its due date or you are in breach of any other
         provision of this letter or the Security when it is in place; or (2) an
         administration order is made in relation to you or a receiver or
         manager or administrative receiver is appointed of you or any of your
         assets or you enter into liquidation; or (3) any distress or execution
         is levied on or affects any material part of your property or assets;
         or (4) you are insolvent or unable to pay your debts; (5) you cease to
         carry on business; or (6) if any of the above events at (2) - (5) occur
         to any of your subsidiaries which have entered into the Security or (7)
         if any event analogous to those set out at (2) - (5) above occurs to
         you or any of your subsidiaries which have entered into the Security,
         occurs in any other jurisdiction to which you or such subsidiaries are
         subject.

8.       COST AND EXPENSES

         You will pay, on demand all reasonable costs and expenses (and VAT)
         which we may from time to time incur in connection with the enforcement
         of my rights under this letter and/or the loan.
<PAGE>

9.       NOTICES

         Any demand or notice in respect of this letter and/or the loan will be
         in writing and (without prejudice to any other effective means of
         serving it) may be served on you personally or by post or by telefax
         and either by delivering it to any of your officers at any place or by
         despatching it addressed to you at your registered or principal office
         for the time being or if faxed by sending to you on UK fax no: 0181 946
         4027. Any such demand or notice delivered personally shall be deemed to
         have been received immediately upon delivery. Any such demand or notice
         sent by post shall be sent by a guaranteed next day delivery service
         and shall be deemed to have been received at the opening of business on
         the second working day following the day on which it was posted, even
         if returned undelivered or if faxed on the printing of a slip on our
         telefax machine showing "transmission OK".

10.      PURPOSE

         The loan is primarily for working capital purposes.

11.      TIME OF THE ESSENCE

         Time shall be of the essence in respect of your obligations under or in
         respect of this facility but no failure by us to exercise or delay in
         exercising any right or remedy under or in respect of this facility
         shall operate as a waiver of it, nor shall any single partial or
         defective exercise by us or any such right or remedy preclude any other
         or further exercise of that or any other right or remedy.

12.      GOVERNING LAW AND JURISDICTION

         This letter shall be governed by and construed in accordance with
         English law and all disputes in connection with this letter and loan
         shall be subject to the non-exclusive jurisdiction of the courts of
         England.

13.      ACCEPTANCE

         To accept the terms and conditions of this letter, please sign and
         return the enclosed copy failing which this letter will lapse and the
         loan will not be available to you.

Yours faithfully

/s/ Michael Bourne
       DIRECTOR
for Grange Nominees Ltd (Account CP 2698)

Agreed and Accepted

/s/ Nicholas P.S. Bray
Date:

For and on behalf of
GENTIA SOFTWARE PLC
Director
<PAGE>

                               GENTIA SOFTWARE PLC

Minutes of a Meeting of the Board of Directors held by teleconference on 9th
December 1999.

PRESENT:          Robin W. I. Lodge         (Chairman)
                  Alan Wallman
                  Steve Fluin
                  Nick Bray
                  Tim Jones

IN ATTENDANCE:

1.       QUORUM

         It was noted that a quorum of the Board of Directors was present, and
         the Meeting was therefore declared open.

2.       PURPOSE

         The Chairman reported to the Meeting that Grange Nominees Ltd Account
         CP 2698 was proposing to lend $300,000 to the Company pursuant to a
         loan agreement (the "Loan Agreement").

3.       LOAN AGREEMENTS

3.1      There was produced to the meeting the Loan Agreement.

3.2      The Chairman reported that Grange Nominees Ltd Account CP 2698 had
         offered to lend the Company $300,000 pursuant to the Loan Agreement
         repayable by the Company together with interest (at a rate of two per
         cent (2%) above one month US dollar L.I.B.O.R as varied from time to
         time) at any time forthwith on demand.

3.3      The Chairman highlighted paragraph 4 of the Loan Agreement which
         requires the Company and its subsidiary companies to enter into a
         composite guarantee and debenture to be signed within 7 days of the
         date of the Loan Agreement and paragraph 5 relating to the conversion
         of the loan from debt to equity. It was noted that the Company on
         demand for repayment of the loan will forthwith agree the terms upon
         which the loan can be converted into American Depository Shares ("ADS")
         of the Company which such ADSs being (1) evidenced by American
         Depository Receipts, (2) registered under the United States Securities
         Act of 1993 (as amended) and (3) listed on the NASDAQ National Market.
         Each ADS shall represent one ordinary share, par value 15p of the
         Company and for these purposes the deemed market value of each ordinary
         share shall be $4.625.

3.4      The Chairman also reported that the Company had agreed in principle to
         issue to Grange Nominees Ltd Account CP 2698 warrant certificates
         entitling Grange Nominees Ltd Account CP 2698 to subscribe at US
         dollars 4.625 per share equal to 50% of the number of shares to which
         Grange Nominees Ltd Account CP 2698 is entitled to convert its loan
         under paragraph 5 of the Loan Agreement. The warrant certificates are
         to be issued when the ADS referred to in paragraph 5 are issued.

3.5      The Board was asked to consider and, if thought fit, approve the
         entering the Loan Agreement, the composite guarantee and the debenture
         and issuing the warrant certificates.
<PAGE>

4.       APPROVAL OF AGREEMENTS

4.1      After due and careful consideration, the Board was unanimously of the
         opinion that the execution and delivery by or on behalf of the Company
         of the Loan Agreement, its composite guarantee and the debenture and
         then issue the warrant certificates and the exercise by the Company of
         its rights and the performance by the Company of its obligations
         thereunder would materially benefit the Company as it would enable the
         Company to have access to working capital.

4.2      Accordingly, it was resolved that the entering into the Loan Agreement
         the composite guarantee, the debenture and the warrant certificate be
         and are approved and that the signature by any director of all and any
         such documents in the form produced to the meeting be and are
         authorised.

5.       FILING OF DOCUMENTS

         The Secretary was instructed to completed appropriate entries in the
         books of the Company and arrange for all necessary forms to be filed at
         Companies House.

6.       CLOSE

         There being no further business the Meeting concluded.

                                               /s/ Nicholas P.S. Bray
                                          --------------------------------------
                                                                        DirectorExhibit 4.7

From:             Banco Nominees (Guernsey) Ltd
                  PO Box 208
                  Bermuda House
                  St Julian's Avenue
                  St Peter Port
                  Guernsey GY1 3NF

To:               Gentia Software plc
                  Tuition House
                  St. George's Road
                  Wimbledon
                  London SW19 4EU

                                                               9th December 1999

Dear Sirs:

1.       AMOUNT

         We are pleased to make available to you a loan in the principal sum of
         $550,000 on the terms and conditions of this letter. The money shall be
         paid into an account in the name of Gentia Software plc at Barclays
         Bank Plc account number 20684058, sort code 20-65-63. Payment shall at
         our option be made in US dollars or in the sterling equivalent.

2.       REPAYMENT

         You will repay the loan together with interest on it at any time
         forthwith on demand.

3.       INTEREST

         The principal amount of the loan outstanding from time to time will
         carry interest at the rate of two per cent (2%) per annum above one
         month U.S. dollar L.I.B.O.R. as varied from time to time accruing daily
         and payable quarterly in arrears at the end January, April, July and
         October in each year. However, if you default in the payment or
         repayment on the due date of any sum from time to time due under this
         letter or if the provisions of clause 4 are not complied with in full,
         interest will accrue on a daily basis (payable on demand) on the amount
         in respect of which default has been made from the date of default
         until actual payment (both before and after judgment) at the rate of
         five per cent (5%) per annum above one month U.S. dollar L.I.B.O.R.

4.       SECURITY

         As security for your obligations to us under this loan you and your
         subsidiaries shall enter into a composite guarantee and debenture (in a
         form satisfactory to us) with us within 7 days of the date of this
         letter (the "Security") and provide us with a copy of your and your
         subsidiaries board minutes approving your entry into the Security (all
         in a form satisfactory to us).
<PAGE>

5.       CONVERSION FROM DEBT TO EQUITY

         On demand by us for the repayment of the loan you will forthwith agree
         the terms upon which the loan can at our election be converted into
         American Depository Shares ("ADS") of the Company with such ADSs being
         (1) evidenced by American Depository Receipts, (2) registered under the
         United States Securities Act of 1993 (as amended) and (3) listed on the
         NASDAQ National Market. Each ADS shall represent one ordinary share,
         par value 15p of the Company and for these purposes the deemed market
         value of each share shall be $4.625.

6.       SET OFF

         You will make all payments under or in respect of this facility for
         value on the due date in US dollars to us at such account as we may in
         our sole discretion nominate and from time to time instruct you in
         writing. If any payment becomes due on a day which is not a day on
         which banks are generally open for business in London, the due date of
         such payment will be extended to the next business day. You will make
         all payments under or in respect of this facility without set-off or
         counterclaim and free and clear of any withholding or deduction for or
         on account of tax, save as may be required by law.

7.       MANDATORY PREPAYMENT

         Notwithstanding the above provisions of this letter, the loan and all
         interest on it will become due and payable or repayable forthwith on
         demand by us if (1) you fail to pay any sum under this letter within
         three business days of its due date or you are in breach of any other
         provision of this letter or the Security when it is in place; or (2) an
         administration order is made in relation to you or a receiver or
         manager or administrative receiver is appointed of you or any of your
         assets or you enter into liquidation; or (3) any distress or execution
         is levied on or affects any material part of your property or assets;
         or (4) you are insolvent or unable to pay your debts; (5) you cease to
         carry on business; or (6) if any of the above events at (2) - (5) occur
         to any of your subsidiaries which have entered into the Security or (7)
         if any event analogous to those set out at (2) - (5) above occurs to
         you or any of your subsidiaries which have entered into the Security,
         occurs in any other jurisdiction to which you or such subsidiaries are
         subject.

8.       COST AND EXPENSES

         You will pay, on demand all reasonable costs and expenses (and VAT)
         which we may from time to time incur in connection with the enforcement
         of my rights under this letter and/or the loan.
<PAGE>

9.       NOTICES

         Any demand or notice in respect of this letter and/or the loan will be
         in writing and (without prejudice to any other effective means of
         serving it) may be served on you personally or by post or by telefax
         and either by delivering it to any of your officers at any place or by
         despatching it addressed to you at your registered or principal office
         for the time being or if faxed by sending to you on UK fax no: 0181 946
         4027. Any such demand or notice delivered personally shall be deemed to
         have been received immediately upon delivery. Any such demand or notice
         sent by post shall be sent by a guaranteed next day delivery service
         and shall be deemed to have been received at the opening of business on
         the second working day following the day on which it was posted, even
         if returned undelivered or if faxed on the printing of a slip on our
         telefax machine showing "transmission OK".

10.      PURPOSE

         The loan is primarily for working capital purposes.

11.      TIME OF THE ESSENCE

         Time shall be of the essence in respect of your obligations under or in
         respect of this facility but no failure by us to exercise or delay in
         exercising any right or remedy under or in respect of this facility
         shall operate as a waiver of it, nor shall any single partial or
         defective exercise by us or any such right or remedy preclude any other
         or further exercise of that or any other right or remedy.

12.      GOVERNING LAW AND JURISDICTION

         This letter shall be governed by and construed in accordance with
         English law and all disputes in connection with this letter and loan
         shall be subject to the non-exclusive jurisdiction of the courts of
         England.

13.      ACCEPTANCE

         To accept the terms and conditions of this letter, please sign and
         return the enclosed copy failing which this letter will lapse and the
         loan will not be available to you.

Yours faithfully   For and on behalf of
                   BANCO NOMINEES (GUERNSEY) LTD.

              /s/ Michael Bourne            Authorised Signatory

Agreed and Accepted

/s/ Nicholas P.S. Bray

Date: 9th November 1999

For and on behalf of
GENTIA SOFTWARE PLC
Director
<PAGE>

                               GENTIA SOFTWARE PLC

Minutes of a Meeting of the Board of Directors held by teleconference on 9th
December 1999.

PRESENT:          Robin W. I. Lodge         (Chairman)
                  Alan Wallman
                  Steve Fluin
                  Nick Bray
                  Tim Jones

IN ATTENDANCE:

1.       QUORUM

         It was noted that a quorum of the Board of Directors was present, and
         the Meeting was therefore declared open.

2.       PURPOSE

         The Chairman reported to the Meeting that Banco Nominees (Guernsey)
         Limited ("Banco Nominees") was proposing to lend $550,000 to the
         Company pursuant to a loan agreement (the "Loan Agreement").

3.       LOAN AGREEMENTS

3.1      There was produced to the meeting the Loan Agreement.

3.2      The Chairman reported that Banco Nominees had offered to lend the
         Company $550,000 pursuant to the Loan Agreement repayable by the
         Company together with interest (at a rate of two per cent (2%) above
         one month US dollar L.I.B.O.R as varied from time to time) at any time
         forthwith on demand.

3.3      The Chairman highlighted paragraph 4 of the Loan Agreement which
         requires the Company and its subsidiary companies to enter into a
         composite guarantee and debenture to be signed within 7 days of the
         date of the Loan Agreement and paragraph 5 relating to the conversion
         of the loan from debt to equity. It was noted that the Company on
         demand for repayment of the loan will forthwith agree the terms upon
         which the loan can be converted into American Depository Shares ("ADS")
         of the Company which such ADSs being (1) evidenced by American
         Depository Receipts, (2) registered under the United States Securities
         Act of 1993 (as amended) and (3) listed on the NASDAQ National Market.
         Each ADS shall represent one ordinary share, par value 15p of the
         Company and for these purposes the deemed market value of each ordinary
         share shall be $4.625.

3.4      The Chairman also reported that the Company had agreed in principle to
         issue to Banco Nominees warrant certificates entitling Banco Nominees
         to subscribe at US dollars 4.625 per share equal to 50% of the number
         of shares to which Banco Nominees is entitled to convert its loan under
         paragraph 5 of the Loan Agreement. The warrant certificates are to be
         issued when the ADS referred to in paragraph 5 are issued.

3.5      The Board was asked to consider and, if thought fit, approve the
         entering the Loan Agreement, the composite guarantee and the debenture
         and issuing the warrant certificates.
<PAGE>

4.       APPROVAL OF AGREEMENTS

4.1      After due and careful consideration, the Board was unanimously of the
         opinion that the execution and delivery by or on behalf of the Company
         of the Loan Agreement, its composite guarantee and the debenture and
         then issue the warrant certificates and the exercise by the Company of
         its rights and the performance by the Company of its obligations
         thereunder would materially benefit the Company as it would enable the
         Company to have access to working capital.

4.2      Accordingly, it was resolved that the entering into the Loan Agreement
         the composite guarantee, the debenture and the warrant certificate be
         and are approved and that the signature by any director of all and any
         such documents in the form produced to the meeting be and are
         authorised.

5.       FILING OF DOCUMENTS

         The Secretary was instructed to completed appropriate entries in the
         books of the Company and arrange for all necessary forms to be filed at
         Companies House.

6.       CLOSE

         There being no further business the Meeting concluded.

                                               /s/ Nicholas P.S. Bray
                                          --------------------------------------
                                                                        Director

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