My last 24 Rosetta WU's gave only ONE normal completed result, the rest were all computation errors. Never had that with Seti, nor Predictor. Their problems seem more network/hardware related, whilst Rosetta seems to have corrupt data to begin with.

Just looked at your results - the errors LOOK like the "application left in memory when preempted = no" errors. If that setting isn't "yes", then Rosetta _will_ fail, frequently, as covered in this and many other threads... it's a known bug, that they're chasing. (Much less fatal than Predictor's "fortran error", or "cypa" WUs that ran for longer than the extremely short deadline, or...) There was also a bad batch of WUs released, that at this point are all cleared out, unless you still have one in your cache from before today.

Have set to YES. I also am running SETI and Predictorat 33% each and have no problems at all with these other two over the past several years.

No project is "perfect" - but the three that have the MOST complaints seem to be SETI, Predictor, and SZTAKI. If you've been able to function well with SETI and Predictor, I would almost guarantee that your current Rosetta problems are very temporary.