ps2pdf has been reported as problematic under windows.
One other method is to use Distiller, an application that comes with Adobe Acrobat Standard or the Pro version. PSSPLT creates the *.ps file and distiller grab the ps filename to create a pdf file. You can set watch folders that when a ps file 'arrives' (save folder used by PSSPLT), it gets converted to pdf automatically, avoiding user intervention. Additional code would move the pdf files to the final folder destination. Distiller can also run from the command line, therefore it can be called by the same application that called PSSPLT, and convert the ps file to pdf as part of a loop process.
A second option is to use python to extract data from the *.out files and plot them using matplotlib, saving the picture to pdf format. The user will have to set/deal with plotting options such as titles, legends, curves per plot, plots per page, etc. "Channels" is a tool that will create pdf for selected channels set by the user. Search for channels in this forum for downloading.