C Program fix errors

I have a program written in C using quadravox. [_[login to view URL]][1] It generates an error in one part of the program when looking up a item from I guess a txt file. It works on on part of the program fine but errors when doing the same from a different part. I can send all source code and a flowchart. This was written by an individual who can no longer be contacted. If nee be I can even send a device to test it on. I need to get this fixed within 2 weeks. Let me know what you think. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Gasoline testing device running a TI processor.