Hi Ashish and Michael, Thanks for your replies. I have done 2 or 3 builds and not seen the problem again, although when I posted, I had seen the problem about 3 times. I'll let you know if I see it again.
I am relatively new to VIPM. When I build a package, VIPM hangs while cleaning up temporary files. I have to kill it with Task Manager. However, the good news is that it successfully builds the package. I am using Windows 7 32 bit, VIPM 2014, LabVIEW 2011. Any ideas, anyone?