Problem generate PS

We are testing an application that uses CSV files as input, the template uses dynamic PDF files as masks, the output is PostScript. Processing with few records is OK. When processing production files with more than 1000 records, an error occurs in the output step.
Output as a PDF processes normally. We are getting the following error:

“ApplicationException: Error from flattener program while saving to file C:\Users\srv.planetpress\Connect\temp\Weaverengine\17256\com.objectiflune.weaver.engine7041248343026314826\EW-temp-15852350970713229685\EW-flatten15040341295243916348.pdf: could not save to file “C:\Users\srv.planetpress\Connect\temp\Weaverengine\17256\com.objectiflune.weaver.engine7041248343026314826\EW-temp-15852350970713229685\EW-flatten15040341295243916348.pdf”: The file may be read-only, or another user may have it open. Please save the document with a different name or in a different folder. (SRV000041)
com.objectiflune.core.base.ApplicationException: Error from flattener program while saving to file C:\Users\srv.planetpress\Connect\temp\Weaverengine\17256\com.objectiflune.weaver.engine7041248343026314826\EW-temp-15852350970713229685\EW-flatten15040341295243916348.pdf: could not save to file “C:\Users\srv.planetpress\Connect\temp\Weaverengine\17256\com.objectiflune.weaver.engine7041248343026314826\EW-temp-15852350970713229685\EW-flatten15040341295243916348.pdf”: The file may be read-only, or another user may have it open. Please save the document with a different name or in a different folder.”

Is this reproducible every time with the same input data file?
Have you made sure that the C:\Users\srv.planetpress\Connect folder structure is part of the white list of your anti-virus?