I sometimes get about 10% failures importing Contacts - tried pretty small batches of about 500, then 100. The fields in the error file are scrambled which makes it seem like bad data - corrupted characters or something. Error message is pretty useless:
An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail.
I doubt the inner FaultException would be real useful to me...
I took the time to figure out which 11 recs had failed last time, then reimported just those, and there were no failures. That implies it's not a data problem, but that the underlying import process is buggy. Is the Data Loader unreliable?? Am I wasting time with it?
Help please!