Document:

EX-10.1

Exhibit 10.1

SIXTH

MODIFICATION AGREEMENT

THIS SIXTH MODIFICATION AGREEMENT (“AGREEMENT”) is made as of December 16, 2010, by and among
AVATECH SOLUTIONS, INC., a Delaware corporation (“AVATECH”), and AVATECH SOLUTIONS SUBSIDIARY,
INC., a Delaware corporation (“AVATECH SUBSIDIARY”), jointly and severally, and PNC BANK, NATIONAL
ASSOCIATION, successor by merger to Mercantile-Safe Deposit and Trust Company (“LENDER”). AVATECH
and AVATECH SUBSIDIARY are collectively referred to herein as the “BORROWERS”.

RECITALS

In accordance with the terms and conditions set forth in a Loan and Security Agreement dated
as of January 27, 2006 between the BORROWERS and the LENDER (“ORIGINAL LOAN AGREEMENT”), the LENDER
extended to the BORROWERS a revolving line of credit in the maximum principal amount outstanding at
any one time of Five Million Dollars ($5,000,000.00) (the “LOAN”). Pursuant to the ORIGINAL LOAN

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AGREEMENT, the BORROWERS’ obligations to the LENDER are secured by all of the BORROWERS’ tangible
and intangible assets.

Pursuant to a Modification Agreement dated as of May 30, 2006 (“FIRST MODIFICATION”), the
LENDER extended to the BORROWERS a short term bridge loan, in the amount of Six Million Five
Hundred Thousand ($6,500,000.00) (“BRIDGE LOAN”), and the terms of the ORIGINAL LOAN AGREEMENT were
modified in certain respects. All sums due in connection with the BRIDGE LOAN have been repaid by
the BORROWERS.

Pursuant to a Second Modification Agreement dated as of December 31, 2006 (“SECOND
MODIFICATION”), a Third Modification Agreement dated as of December 31, 2008 (“THIRD
MODIFICATION”), and a Fourth Modification Agreement dated as of December 31, 2009 (“FOURTH
MODIFICATION”), the terms of the ORIGINAL LOAN AGREEMENT were modified in certain additional
respects. Pursuant to a Fifth Modification Agreement dated as of August 17, 2010 (collectively
with the ORIGINAL LOAN AGREEMENT, the FIRST MODIFICATION, the SECOND MODIFICATION, the THIRD
MODIFICATION and the FOURTH MODIFICATION, the “LOAN AGREEMENT”), the LENDER consented to the entry
by a new subsidiary of AVATECH into a merger transaction (the “MERGER”) with Rand Worldwide, Inc.,
and the terms of the LOAN AGREEMENT were modified in certain additional respects.

Pursuant to the terms of the LOAN AGREEMENT, the current maturity date of the LOAN is December
19, 2010. The BORROWERS have requested that the LENDER extend the maturity date of the LOAN to
January 31, 2011. The LENDER has agreed to the BORROWERS’ request, but only in accordance with the
terms and conditions set forth herein. As used herein, the term “LOAN DOCUMENTS” shall
collectively mean the LOAN AGREEMENT and all other documents and agreements evidencing or securing
the LOAN. Unless otherwise defined herein, any terms appearing in all capital letters in this
AGREEMENT shall have the respective meanings ascribed to such terms in the LOAN AGREEMENT.

NOW, THEREFORE, in consideration of the foregoing premises, the terms and conditions set forth
herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

1. Representations And Warranties Of Borrowers. To induce the LENDER to enter into
this AGREEMENT and to provide the BORROWERS with the accommodations described herein, the BORROWERS
make the representations and warranties set forth below and acknowledge the LENDER’S justifiable
right to rely upon these representations and warranties.

a. No Litigation. There is no action, suit, investigation, or proceeding pending
against either of the BORROWERS or any other assets of either of the BORROWERS, except for those
proceedings previously disclosed to the LENDER in writing.

b. Organization; Good Standing; Authorization. Each of the BORROWERS: (a) has the
power to enter into this AGREEMENT and all other documents, and agreements required to be executed
pursuant to this AGREEMENT, and has the power to perform all of its obligations hereunder and
thereunder; (b) has duly authorized the entry into and performance of this AGREEMENT and all other
documents and agreements required to be executed by such BORROWER; and (c) is in good standing in
the state of its incorporation or organization, as applicable, and is in good standing and
qualified as a foreign corporation or limited liability company, as applicable, in all other states
in which such qualification is required.

c. Valid, Binding And Enforceable. This AGREEMENT and all of the other documents and
agreements executed pursuant to this AGREEMENT are the valid and binding obligations of the
BORROWERS and are fully enforceable against each of the BORROWERS in accordance with their terms.

d. Subsidiaries. AVATECH SOLUTIONS SUBSIDIARY, INC. is a wholly-owned subsidiary of
AVATECH SOLUTIONS, INC. Except for the subsidiary created by AVATECH in connection with the
MERGER, the BORROWERS have no other subsidiaries.

2. Amendments To Loan Agreement. The LOAN AGREEMENT is hereby modified and amended as
follows:

a. Amendment to Definition. The definition of “LOAN DOCUMENTS” contained in Section
1.66 of the LOAN AGREEMENT shall also include, without limitation, this AGREEMENT.

b. Extension of Maturity Date. The definition of “MATURITY DATE” contained in Section
1.70 of the LOAN AGREEMENT is modified by replacing the existing provision with the following:

Section 1.70. Maturity Date. The term “MATURITY DATE” means
January 31, 2011, as such date may be extended by written agreement of the
LENDER.

4. No Novation; No Refinance; No Adverse Effect On Liens. The parties hereto do not
intend that a novation of the LOAN or any of the LOAN DOCUMENTS shall be created or effected
because of the modification of the LOAN AGREEMENT, as described herein. The parties hereto do not
intend that the execution of this AGREEMENT, and the amendments and modifications to be made to the
LOAN AGREEMENT, as described herein, shall: (a) constitute a refinance of the LOAN; or (b) affect
or impair the validity, enforceability, or priority of any of the liens or security interests
imposed by or granted in the LOAN DOCUMENTS.

5. Other Terms; Confirmation Of Obligations. Other than the foregoing, all other
terms and conditions of the LOAN DOCUMENTS shall remain in full force and effect and are
incorporated herein by reference. The BORROWERS acknowledge, ratify and confirm their respective
obligations under the LOAN DOCUMENTS and further acknowledge and confirm that the BORROWERS are and
shall remain absolutely and unconditionally obligated to pay the LENDER all present and future
indebtedness that is owed to the LENDER under the LOAN DOCUMENTS, as modified hereby, in the manner
provided therein, notwithstanding the LENDER’S execution of this AGREEMENT and any documents to be
executed pursuant to this AGREEMENT, and notwithstanding the various agreements the LENDER has set
forth herein and therein.

6. Security. The BORROWERS’ obligations under the LOAN DOCUMENTS, as modified hereby,
shall continue to be secured by all of the liens, assignments, and security interests provided in
the LOAN DOCUMENTS.

7. Miscellaneous.

a. Incorporation. The terms and conditions of the LOAN DOCUMENTS are incorporated
herein by reference and made a part hereof as if fully set forth herein. In the event of any
inconsistencies between the terms and conditions of this AGREEMENT and any of the terms and
conditions of the other LOAN DOCUMENTS (except as to the specific modifications contained herein),
the LENDER shall determine, in its sole discretion, which of the terms and conditions shall
control.

b. Integration. This AGREEMENT, the LOAN DOCUMENTS (as modified), and any other
documents executed pursuant to or in connection with this AGREEMENT, if any, constitute the entire
agreement between the LENDER and the BORROWERS with respect to the subject matter hereof, and any
term or condition not expressed therein does not constitute a part of the agreement of the LENDER
and the BORROWERS with respect to such subject matter.

c. Severability. If any provision or part of any provision of this AGREEMENT shall
for any reason be held invalid, illegal or unenforceable in any respect, such invalidity,
illegality or unenforceability shall not affect any other provision of this AGREEMENT and this
AGREEMENT shall be construed as if such invalid, illegal or unenforceable provision or part thereof
had never been contained herein, but only to the extent of its invalidity, illegality, or
unenforceability.

d. Number, Gender, And Captions. As used herein, the singular shall include the
plural and the plural may refer to only the singular. The use of any gender shall be applicable to
all genders. The captions contained herein are for purposes of convenience only and are not a part
of this AGREEMENT.

e. Further Assurances. As part of this AGREEMENT, and in consideration for the
agreements of the LENDER as set forth therein, each BORROWER agrees to execute and deliver to the
LENDER such other and further documents as may, from time to time, in the sole opinion of the
LENDER and the LENDER’S counsel, be necessary or appropriate to carry out the terms and conditions
of this AGREEMENT and the LOAN DOCUMENTS. If either BORROWER fails to execute any such documents
within ten (10) days of being requested to do so by the LENDER, such BORROWER hereby appoints the
LENDER or any officer of the LENDER as the attorney in fact for such BORROWER for purposes of
executing such documents in the name, place and stead of such BORROWER, which power of attorney
shall be considered as coupled with an interest and irrevocable.

f. Waivers. No failure or delay by the LENDER in the exercise or enforcement of any
of its rights under any LOAN DOCUMENT shall be a waiver of such right or remedy, nor shall a single
or partial exercise or enforcement thereof preclude any other or further exercise or enforcement
thereof or the exercise or enforcement of any other right or remedy. The LENDER may at any time or
from time to time waive all or any rights under this AGREEMENT or any of the LOAN DOCUMENTS, but
any such waiver must be specific and in writing and no such waiver shall constitute, unless
specifically so expressed by the LENDER in writing, a future waiver of performance or exact
performance by either BORROWER. No notice to or demand upon either BORROWER in any instance shall
entitle such BORROWER (or the other BORROWER) to any other or further notice or demand in the same,
similar or other circumstance.

g. Choice Of Law. The laws of the State of Maryland (excluding, however, conflict of
law principles) shall govern and be applied to determine all issues relating to this AGREEMENT and
the rights and obligations of the parties hereto, including the validity, construction,
interpretation, and enforceability of this AGREEMENT and its various provisions and the
consequences and legal effect of all transactions and events which resulted in the execution of
this AGREEMENT or which occurred or were to occur as a direct or indirect result of this AGREEMENT
having been executed.

h. Consent To Jurisdiction; Agreement As To Venue. Each BORROWER irrevocably consents
to the non-exclusive jurisdiction of the courts of the State of Maryland and of the United States
District Court For The District Of Maryland, if a basis for federal jurisdiction exists. Each
BORROWER agrees that venue shall be proper in any circuit court of the State of Maryland selected
by the LENDER or in the United States District Court For The District Of Maryland if a basis for
federal jurisdiction exists and waive any right to object to the maintenance of a suit in any of
the state or federal courts of the State of Maryland on the basis of improper venue or of
inconvenience of forum.

i. Binding Effect; No Oral Modification. This AGREEMENT shall be binding upon and
shall inure to the benefit of the parties and their respective personal representatives, successors
and assigns. This AGREEMENT may not be altered, modified or amended unless such alteration,
modification or amendment is in writing and executed by the LENDER.

j. Time. Time is of the essence with respect to all of the obligations of the
BORROWERS under this AGREEMENT and the LOAN DOCUMENTS.

k. Costs Of Transaction. All costs of the transactions contemplated by this
AGREEMENT, including without limitation all of attorneys’ fees and expenses incurred by the LENDER,
shall be paid by the BORROWER, regardless of whether such costs are incurred before or after the
execution and delivery of this AGREEMENT.

8. Release; Waiver. As part of the agreements set forth herein, and in consideration
of the same, each BORROWER hereby releases the LENDER and all of the LENDER’S past, present and
future directors, officers, employees, agents and attorneys from any and all claims, causes of
action, suits and damages (including claims for attorneys’ fees) which either of the BORROWERS,
jointly or severally or otherwise, ever had or now have against the LENDER or any of the LENDER’S
past, present and future directors, officers, employees, agents or attorneys. Without limiting the
generality of the foregoing, each BORROWER acknowledges and agrees that there exists no offset or
defense to the obligations of any BORROWER as stated in the LOAN DOCUMENTS.

9. Waiver Of Jury Trial. The parties hereto agree that any suit, action, or
proceeding, whether claim or counterclaim, brought or instituted by any party to this AGREEMENT, or
any of their successors or assigns, on or with respect to this AGREEMENT or any LOAN DOCUMENT or
which in any way relates, directly or indirectly, to the obligations of the BORROWERS to the LENDER
under this AGREEMENT or any LOAN DOCUMENT, or the dealings of the parties with respect thereto,
shall be tried only by a court and not by a jury. THE PARTIES EXPRESSLY WAIVE ANY RIGHT TO A TRIAL
BY JURY IN ANY SUCH ACTION OR PROCEEDINGS. The parties acknowledge and agree that this provision
is a specific and material aspect of the agreement between the parties and that the parties would
not enter into this AGREEMENT if this provision were not contained herein.

[SIGNATURES BEGIN ON FOLLOWING PAGE]

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IN WITNESS WHEREOF, the parties have executed this AGREEMENT as of the date first above

written with the specific intention of creating a document under seal.

	 	 	 	 	 	 	 
	WITNESS/ATTEST:
	 	BORROWERS:
	 	

	 	

	 	 	AVATECH SOLUTIONS, INC.,	 	 
	 	 	A Delaware Corporation	 	 
	 	 	By:
	 	/s/ Lawrence Rychlak

	 	(SEAL)
	 
	 	 	 	 

	 	

	 	 	 	 	Lawrence Rychlak,

President and Chief Financial Officer

	 	

AVATECH SOLUTIONS SUBSIDIARY, INC.,

A Delaware Corporation

	 	 	 	 	 
	By:
	 	/s/ Lawrence Rychlak

	 	(SEAL)
	 	 	 

	 	

	 	 	Lawrence Rychlak,

President and Chief Financial Officer

	 	

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LENDER:

PNC BANK, NATIONAL ASSOCIATION

	 	 	 
	By:
	 	/s/ Stephen D. Palmer—(SEAL)

	 	 	 

	 	 	Stephen D. Palmer, Senior Vice President

4EX-4.2

AMENDMENT TO RIGHTS AGREEMENT

This Amendment, dated as of December 15, 2010 (this “Amendment”), is entered into by and
between Saia, Inc., a Delaware corporation (formerly SCS Trasportation, Inc., and herein
the “Company”), and Computershare Trust Company, N.A., a federally chartered trust company (the
successor agent of Mellon Investor Services LLC, and herein the “Rights Agent”), and amends the
Rights Agreement, dated as of September 30, 2002, by and between SCS Transportation, Inc. and
Mellon Investor Services, LLC (the “Rights Agreement”).

WHEREAS, pursuant to Section 27 of the Rights Agreement, the Company may from time to time
supplement or amend the Rights Agreement in accordance with the provisions of Section 27 thereof;

WHEREAS, the Company has determined that it is in the best interest of the Company and its
shareholders to amend the Rights Agreement as set forth herein; and

WHEREAS, all acts and things necessary to make this Amendment a valid agreement, enforceable
according to its terms, have been done and performed, and the execution and delivery of this
Amendment by the Company and the Rights Agent have been in all respects duly authorized by the
Company and the Rights Agent.

NOW, THEREFORE, in consideration of the foregoing and the mutual agreements set forth herein,
and intending to be legally bound, the parties hereto agree as follows:

A. Amendment of Section 7(a). Section 7(a) of the Rights Agreement is hereby amended
and supplemented as follows:

	 	a.	 	By deleting “The “Final Expiration Date”, as used in
this Rights Agreement, shall be September 30, 2012.”

	 	b.	 	and replacing it with: “The “Final Expiration Date”, as
used in this Rights Agreement, shall be December 15, 2010.”

B. Effectiveness. This Amendment shall be deemed effective as of the date first
written above, as if executed on such date. Except as amended hereby, the Rights Agreement shall
remain in full force and effect and shall be otherwise unaffected hereby.

C. Miscellaneous. This Amendment shall be deemed to be a contract under the laws of
the State of Delaware and for all purposes shall be governed and construed in accordance with the
laws of such state applicable to contracts to be made and performed entirely within such state.

D. Counterparts. This Agreement may be executed in multiple counterparts, each of
which shall be deemed to be an original but all of which together will constitute one and the same
instrument. Counterpart signature pages to this Agreement transmitted by facsimile transmission,
by electronic mail in portable document format (.pdf) form, or by any other electronic means
intended to preserve the original graphic and pictorial appearance of a document, will have the
same effect as physical delivery of the paper document bearing an original signature.

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and
attested as of the date first set forth above.

	 	 	 	 	 	 	 
	Attest:

	 	 	 	SAIA, INC.
	 	

	By: /s/ James A. Darby
	 	By: /s/ Richard D. O’Dell
	 
	 	 
	Name:

Title:

	 	James A. Darby

Secretary
	 	Name:

Title:
	 	Richard D. O’Dell

Chief Executive Officer
	Attest:	 	 	 	COMPUTERSHARE TRUST COMPANY, N.A.
	By: /s/ Tyler Haynes
	 	By: /s/ Dennis V. Moccia
	 
	 	 
	Name:

Title:

	 	Tyler Haynes

Manager, Client Services
	 	Name:

Title:
	 	Dennis V. Moccia

Manager, Contract Administration

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