NWDI 7.01 DC Build failed in variant "null"

We have installed a new NWDI, version 7.01.03, created the track with 5 SCs, and imported the 4 required components EP_BUILDT, SAP-JEE, SAP_BUILDT, and SAP_JTECHS. Everything looks good with the track, I then imported the congifuration into NWDS. I then created a new DC and imported a par file - the files look good and the used DCs have been assigned. When I try to build the DC I am getting the following error:

Build failed for compass-usa.com/cgad/custmh(compass-usa.com_CPMCONT_1) in variant "null": null.

I was able to create a new DC yesterday that I was able to build. The difference that I can see is in the gen folder, the one that errors on the build has a subfolder called null, the one that works has a sub folder called default. Any ideas what the problem could be, what may have changed?

Thanks,

Jeff Mathieson