I have three tasks in process on one machine (computer ID 1266353). One looks to be progressing normally, but two jobs have been progressing 33 hours (of approx 300 hours remaining) and are showing zero progress on my BOINC client -- even though they are showing over 622 granted credits. Does this make sense? Wondering why the client is showing 0.00% progress -- seems progress should be around 10%. (I'm running client version 7.0.64 on this machine).

Credits are given all through the processing of the model, each time that they return a trickle_up file. It's a fairly useless indication of what's wrong.

Click on the Show graphs button for each model, and watch the progress data in the bottom left corner. If the lines increment for a while, and then suddenly revert to an earlier value, then the model is looping. You can try re-starting BOINC to see if that gets one or both going again, but usually you need to Abort them.

Progress indicated in shown graphs (progress area) shows me at time step 107,400 of approx 1,039,000 and at 10.34%, but the BOINC client task tab is showing 0.00% progress on this work unit.

But do the lines in the graphics window behave as I described?

I'm not sure what "lines" you are referring to. In the lower left corner, the progress indicator is progressing along and are incrementing. Now at time step 111,286 and 10.71% complete...are these the lines you are referring to?

Wow...For the heck of it, I just exited BOINC and restarted it. Now the BOINC TASK TAB (for this same work unit) is showing 10.74% complete but instead of 33 hours elapsed time...it is now only showing 2 minutes. While the show graphics properties display is showing continuing progress at time step 111,756 and 11.74% complete.....Something seems amiss in the BOINC client TASK Tab progress information....