Did you ever find out any more information on this? I have a 2001 Buick Century with a P04 PCM that is having problems after writing. Your last post with the "went bad" debug log looks similar to mine where it fails to write to the memory blocks in your debug log around line 8110.

I would like to preface this by saying I am very new to PCM programming and it is most certainly my mistake whatever happened. I used an obdlink LX to read a bin file of my 2001 Buick century custom with a 3.1L engine. It appears this was the easy part. After looking around for an xdf and not findin...