strange behavior creating a netlist orcad 16.6 windows 7

I have had orcad 16.6 for about a year and have ran across a strange behavior.  I click on the netlist icon and it asks for the file name, I enter the .mnl file name click OK it then says it is going to save the file prior to netlisting, I click on OK It then tells me that there are errors, which I expect as their is always something wrong that it finds.  This is where the strange behavior occurs, when I click on OK the prompt goes away and no session log or netlist are created, and this is where I am stuck.  I have tried rebooting my computer, i have created a new project and copied and pasted the entire (one page) design into a different file name, I get the same results,  Any help out there?