Frames are like pieces of the work unit, you need to finish them all before the result can be sent. Here's a bit of one of my log files:
[22:53:41] Protein: proteinAnat
[22:53:41] - Frames Completed: 28, Remaining: 72
[22:53:41] - Dynamic steps required: 360000
It's telling me that it has 72 more frames out of 100 to do, then
it will send the result. Give it time, the PII 400 takes forever to get some of the WUs done.