Resolve freezing during render

[Tom Sefton]

Keep getting Resolve freezing during render. Beach ball appears, but render ball keeps spinning. Files stop writing and resolve needs to be restarted.

Job is just a queue of a single 40 minute r3d sequence at 4K UHD being encoded to Pro Res LT at 4k. Sequence is chopped up into compound clips with an external audio track linked to it.

Media stored on a G Tech Studio XL thunderbolt 2. Mac OS 10.10, New mac pro 6 core, D700s, 32GB RAM. Most recent version of Resolve.

Happens regardless of whether the database is stored on the Mac OS drive, or on the thunderbolt drive. Happens whether the project is built entirely in Resolve, or from an xml import from Premiere.

Switched off app nap, nothing else running. Attached via thunderbolt is a display, 2 studio XL RAIDs and an Ultrastudio 4K.

Very frustrating and inconsistent as to when it freezes. Don't get a crash log when having to force quit.

Anyone have any ideas and help?

 

[Jon D Kline]

It couldn't hurt to do a RAM test. It could also be related to heat buildup if you have a failed fan.

 

[Tom Sefton]

Ok thanks for the tips.

Is there a way to check for a failed fan without taking the box apart....?

 

[Dwaine Maggart]

Tom, you posted in the BMD Resolve Forum and on the Creative Cow Resolve group that turning off App Nap had solved your issue. Based on your comments here, is that not the case?

 

[Tom Sefton]

Hi Dwaine

No I think that must have been a bit premature and the app nap could have been a red herring. I've had 3 or 4 more render freezes over the last 2 days and these are occurring on projects that are older ones on a local disk database, and ones created within the last couple of hours on a disk database hosted on the thunderbolt drive. Frustrating as it is being left overnight and it freezes within the first hour. The strange thing, is that if it is restarted on the same project, it seems to render the whole thing through at the second attempt?

Odd.

 

[Peter Chamberlain]

I recommend you try 10.10.2 OS and keep disk database internal to Mac.
Finally, try non ProResLT render to see if thats causing your issue.