Hi @Dynamo_Ann,
Depending on the number of sheets to print, one PassThrough node may not be sufficient. You must then add a Thread.Pause to be sure that all the pdf files have been created.
That said, I have already added in the ExportPDF node of the Genius Loci package the ability to combine the sheets between them. (input Combine)
PDF_Export_1.6 w python filter V2.dyn (41.0 KB)