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Did you construct the full file name (folder plus base file name plus extension) with the fullfile() function, or did you just use the base filename and extension and hope that somehow the file was luckily on your search path?
Please take the time and read your question again. Then check, whether a meaning answer is possible based on the provided information. All we know, is that you expect a file at a certain location but any program shows an error message, that the file is not there. I'm convinced, and you could be it also, that the file is not there, because computers to not cheat or lie in such situations. This means, that your expectation is wrong.
If you show us, which code you use, where the file is, which program you call and explain why you assume, that the file is there, we have a chance to post a meaningful answer.
Image Analyst took his experience with answering questions for many years to guess more details.
I am using program developed by someone and in the program folder i have files names like data.m, data.out etc. when i run the code, software gives some highlighted errors with message of "fix" and for some error just "details".
I am using matlab program from following link: http://www.ssc.wisc.edu/~bhansen/progs/joe_99.html