A recent exchange with a software company's technical support:
I am attempting to compare two documents using compare_files, and am receiving the error code "-10". What does this error mean?
The 5.3 M030 patch which fixes SPR 1409567, the ‘The compare_files functions returns '[A19321] Compare: unknown error when comparing two files’ problem is available for download from the PTC Support site. There are alternate solutions for this problem.
We are unable to upgrade from 5.2 to 5.3 at this time. What is the alternative solution?
Sorry for the typo in my earlier response to you. I meant to write that there are no alternative solutions for this problem.