Comatibility issues with professional pdfmod. They told me that they only can view it and that my pdf-file causes in their professional testing and printing software.

A professional printing house is not able to work mith my pdf-file, that I put together and rearranged with pdfmod. They told me that they only can view it and that my pdf-file causes crashes in their professional testing and printing software. They asked me to save the file according to the pdf-x3 standard, which was impossible with pdfmod. Finally I sent them the same PDF-elements that were not put together with pdfmod, what did not cause any problems.

My OS is Ubuntu 14.04.4 LTS and I am using the pdfmod package 0.9.1-7 provided by the official ubuntu sources.