Method .cStart "/NoProcessingAtStartup" has failed


I am developing a macro in VBA for Excel and I encounter a problem.

When launching my macro, I get an error screen after some time saying something like: (I have the french version)

The method    .cStart "/NoProcessingAtStartup" has failed

This instruction is in a loop because I create a large number of PDF files.

I still manage to create one PDF. On the second iteration, I get the error screen.

Any ideas why this might come up ?

Thanks a lot