ProjectWise IPLOT Server and PostScript output

We are using PostScript Printer Driver (i.e. Ghostscript) to generate PostScript output files with ProjectWise IPLOT Server.
Since last week it doesn't work anymore. A valid PostScript file is not created. I suppose because of an Microsoft OS update.

The Bentley suggestion  to DisableServerFilePooling with registry key doesn't help.

Is anyone here with the same problem?