Usually errors like these
AppName: test.exe AppVer: 0.81.0.0 ModName: perl58.dll ModVer: 5.8.6.811 Offset: 0008775c
are caused because the exe uses more memory than it should, so it crash with Offset errors.
Try to use the exe with smaller files than 500KB and see if it works.
If it does work then break the files to smaller pieces and handle them one at a time.
Let me know what happen.