Hello Deva.
I think the question is not in load, but the bad programm code for exporting, PDMS doesn't release occupied memory after exporting of previous block of data. I also noticed that PDMS crashes when des.exe process reachess almost 4GB of memory, which is 32 bit limit I suppose. Because PDMS 12.0 is 32 bit application. Is PDMS 12.1 a 64 bit oriented software?