Patent ID: 8171439

Claim:
A warning device which checks an error in design object data and issues a warning with respect to each detected error, the warning device comprising: an error identification information storing unit to store allowance information which indicates issuance of a warning to be prevented and cancel information which indicates cancellation of relevant allowance information to permit issuance of a warning in association with each error identification information which identifies a respective error; an instruction identification information storing unit to store instruction identification information which identifies an edit command for editing the design object data in association with said error identification information; an error checking unit to check for a respective error corresponding to each of the error identification information stored in said error identification information storing unit when an operation for checking the design object data is accepted; an error identification information acquiring unit to, when an edit command is accepted in response to an error detected by the error checking unit, acquire the error identification information stored in association with the instruction identification information of said edit command in said instruction identification information storing unit; a cancel information registering unit to register said cancel information in said error identification information storing unit in association with the acquired error identification information associated with said edit command; a warning permission determining unit to, for each error identification information corresponding to an error detected by said error checking unit, determine whether to issue a warning based on the allowance information and cancel information stored in association with the relevant error identification information in said error identification information storing unit; and a warning issuing unit to issue the warning if said warning permission determining unit determines that the warning should be issued.