Unfortunately I'm not able to use the AdWords libraries as my PHP software is out of date. Updating will break the rest of te application.
So I have to communicatie with the API myself.
Therefore I'm using BatchJobService.
It works fine when I'm uploading 1 file up to 256k and filling the empty space.
When the changes are bigger and I have to upload more than 1 file, I get an BatchJobProcessingError.FILE_FORMAT_ERROR error.
The upload itself succeeds, I get back an OK status, so it must be AdWords interpretations.
Any idea what can go wrong?
I attached the files.
When I check the files, it seems the split was fine.