Branch run: request exceeds max nodex, alloc

Hello. I am a new user of ccsm3. I am trying to run a fully coupled FV B_PRESENT_DAY branch run of CCSM3 on franklin at NERSC using restart files. I built the model successfully, but when I run it, it crashes and says "request exceeds max nodes, alloc." I have a new NERSC account so i know my allocation did not run out. Am I suppose to edit the nodes options somehow? Any idea what might be wrong?

Thanks, Michael
 

rneale

Rich Neale
CAM Project Scientist
Staff member
It is not that your allocations have run out.
I think it is because you are asking for more nodes when CCSM tries to allocate them
than you asked for in the PBS -l mppwidth command at the top of your runscript.
It could also be some restriction on the number of nodes per job you are asking for, for
a particular queue and/or runtime
 
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