Thank you for your inquiry regarding problems closing MAX 2.2. It sounds like MAX crashes causing an invalid page fault in module PDM.DLL. This problem can happen when Microsoft Visual Studio is installed. The following link is a great resource when dealing with this issue.
Other resources similar to this can be found on the ni.com website by clicking the support tab at the top of the home page. Then search for �PDM.DLL� from Technical Resources at the top of the page or topics similar to this. I hope these resources help. Let me know if I can further assist you.