I get this error all the time in Poser 9.  I just tell Poser to skip it and not look for anything else then resave the file.  You would think Poser would be smart enough to realize that NO_MAP is not an image file.  Thanks for the suggestion to create an empty text file.

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro