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Bug w/ building & running CESM1 / CLM4

Hi, we are working on getting CESM / CLM4 up and running on our Linux cluster here using the create case tool for a regional test case. The configure and build seem to complete without errors, but when I run ccsm.exe (either via mpirun or just directly), I get the following errors:

0 - MPI_GROUP_RANGE_INCL : Invalid rank 1
[0] Aborting program !
(seq_comm_setcomm) initialize ID ( 7 GLOBAL ) pelist = 0 0 1 ( npes = 1) ( nthreads = 1)
[0] Aborting program!
p0_27915: p4_error: : 8262

I have been working with our admin. to make sure I have all libraries linked correctly in the various /Machine/ files.

Thanks in advance for any help on this.
 
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