John:
Are you saving your NodeXL workbooks to a folder that is shared between the Windows and Mac partitions? I suspect that's the cause of the problem you are seeing. Try saving a workbook to a folder that isn't shared to see if that fixes the problem.
See this article for information on how to control which folders are shared between the two partitions:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004055
-- Tony
Are you saving your NodeXL workbooks to a folder that is shared between the Windows and Mac partitions? I suspect that's the cause of the problem you are seeing. Try saving a workbook to a folder that isn't shared to see if that fixes the problem.
See this article for information on how to control which folders are shared between the two partitions:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004055
-- Tony