I experience a similar problem as user MDCT. I created an app using mostly standard scripts to look for PDF files in a directory and print them to the default printer. The app also uses the default PDF application (Foxit Reader in my case). The problem is that after each loop the app builds up memory. Is there a way to free up the memory or is there something that I can do differently in the code? PC Specs of two similar PCs I tested on: Windows XP (Service Pack 3) Intel Pentium 4, 3.00GHz