When S/W Quality Assurance checks/build my final program, WinDiff indicates major differences, although the file sizes(bytes) are the same. CVI seems to build differently each time a "mark all files for compilation" and then "Build All" is done. I don't think it is a problem, but the QA people do before releasing my program to our Data Control. If I can provide a reason why, QA may accept my final build. Any thoughts or advise?