Pesky Trouble Code

After a couple of reflashes, I'm getting a P0315 (crank position sensor variation not learned) Doing a CKP re-learn in the scan tool control panel doesn't seem to help, although I can't say for sure if it "took" because being a first timer for CKP relearn, I don't know if I'm supposed to see a confirmation dialog or not. I can't say if the DTC is due to the reflash or perhaps a hardware or sensor problem. The car starts just fine, which is not consistant with a failed sensor. If I clear the code and do a relearn, it just comes right back and sets a MIL. I'm thinking perhaps there was some data corruption during the last flash, but I'll wait for some more experienced advice before flashing again.

Has this just started happening?.

Cheers,
Ross

Yes. The last flash I did was my previous tune sitting on O/S 04110001 done as a full flash using 003g. This was done as a temporary setup until I transport my car to the shop. Injectors haven't been swapped out yet.