-9171 and -9172 errors with Pro Tools HD 10.3 on HDX

[Boe Larsen]

PT keeps stopping with errors - mostly (-9172).

"Audio processing could not complete due to conflicts with other CPU tasks or a potential clocking issue..."


My setup is:

OS 10.8.1
(fresh installed on OWC SSD drive and settings imported with migration)
PT10HD 10.3.0 + HDX2
(preferences deleted + disk permissions repaired)
Mac Pro 3.06ghz x 2 (12 core), 40gb ram.

It doesn't seem to be really related to the number of tracks.
I just tried to bounce a track with about 30 audio tracks. No VI's.

Play back engine was set to:
512 samples, 11 processors (of 24), cpu limit: 85%, 256 voices, delay comp: max, cache size: 4gb, plugin buffer: level 2.

It stopped during the bounce.
I changed the buffer to a maximum 1024 and it got through.

But this can't be right... the fastest setup I could get my hands on and then this...

I had similar problems yesterday with about 5 tracks and recording a cue vocal...

Any ideas?

Boe