[Nek5000-users] grid-to-grid

[nek5000-users at lists.mcs.anl.gov]

Hello all,

I just wanted to use grid-to-grid interpolation tool as explained on  
the web to interpolate field data from a coarse resolution case to a  
high resolution mesh. But I have received the following runtime  
error, as shown in the following log file, when I run the case with  
the old geometry:
  .
  .
  .
  nsteps=0 -> skip time loop
  running solver in post processing mode

  call userchk
  grid-to-grid interpolation
  set initial conditions
  Checking restart options: old_fld0.f99999
  nekuic (1) for ifld  1
  nekuic (1) for ifld  2
  Reading checkpoint data
        0 OPEN: old_fld0.f99999
  byte swap: F 6.543210030 -0.2931277218E+36

         0  5.0000E+03 done :: Read checkpoint data
                               avg data-throughput =    34.0MBps
                               io-nodes =  1024

  xyz min    -3.2549      -14.105      -1.0850
  uvwpt min  -1.1888      -1.5496      -.73265      -.40517       .21138
  PS min      .00000E+00   .00000E+00
  xyz max     3.2549       5.4249       1.0850
  uvwpt max   .79789       .84688       .61069       .94441       3.5997
  PS max      .00000E+00   .00000E+00
  Restart: recompute geom. factors.
  regenerate geometry data 1
  vol_t,vol_v: 274.173254616314068 274.173254616314068
  done :: regenerate geometry data 1

  done :: set initial conditions

  initializing intpts(), tol= 0.100000000000000003E-12
  chunk 1 1
  call intpts
  call findpts
ERROR (proc 0000, ~/nek5_svn/trunk/nek/jl/findpts_imp.h:300):  
allocation of 3018752000 bytes failed

I thought it might be due to the lpart parameter in the SIZE, but  
changing that did not solve the issue. The case was run on bgq  
machines with 1024 core with 1 GB/core. Here are the compilation info:

#############################################################
#                  Compilation successful!                  #
#############################################################
    text    data     bss     dec     hex filename
13283121        1941456 37582536        52807113        325c5c9 nek5000


Note that there is no problem with normal running of both cases. I  
was wondering if anyone can help me on this issue.

Thanks,
Mohsen