# Test Case Coupled Step Error with ACCESS-CM2 **URL:** \ **Category:** Coupled Model\ **Tags:** access-cm2\ **Created:** [26 February 2026 05:37 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989 "2026-02-26T05:37:56Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Jatreutlein](https://avatars.discourse-cdn.com/v4/letter/j/c89c15/32.png) [@Jatreutlein](https://forum.access-hive.org.au/u/Jatreutlein)\ **Post date:** [26 February 2026 05:37 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/1 "2026-02-26T05:37:56Z")
Hi all, I’m trying to run the u-cy339 tutorial test case for ACCESS-CM2 for the first time. I ran into this error in the coupled step that I’m unfamiliar with (job.err output): ```auto ???????????????????????????????????????????????????????????????????????????????? ???!!!???!!!???!!!???!!!???!!! ERROR ???!!!???!!!???!!!???!!!???!!! ? Error code: 19 ? Error from routine: CHECK_IOSTAT ? Error message: ? Error reading namelist domain ? IoMsg: invalid reference to variable in NAMELIST input, unit 14, file /scratch/ng72/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/STASHC, line 2565, position 10 ? Please check input list against code. ? Error from processor: 0 ? Error number: 10 ???????????????????????????????????????????????????????????????????????????????? [0] exceptions: An non-exception application exit occured. [0] exceptions: whilst in a serial region [0] exceptions: Task had pid=2950149 on host gadi-cpu-clx-1947.gadi.nci.org.au [0] exceptions: Program is "/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/toyatm" Warning in umPrintMgr: umPrintExceptionHandler : Handler Invoked gc_abort (Processor 0): Job aborted from ereport. -------------------------------------------------------------------------- MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD with errorcode 9. NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. ``` Is there an invalid input in the UM coupling configuration? Here is the start of the job.err output if that helps: ```auto Using the cylc session localhost Loading cylc7/24.03 Loading requirement: mosrs-setup/2.0.1 - Package -----------------------------.- Versions --------.- Last mod. ------- Currently Loaded Modulefiles: mosrs-setup/2.0.1 default 2024/05/19 23:31:13 cylc7/24.03 default 2024/05/06 03:30:21 python2-as-python 2019/11/04 03:02:35 openmpi/4.0.2 2022/02/14 19:20:11 fcm/2019.09.0 2020/12/14 04:10:00 pythonlib/f90nml/1.0.2 2020/12/14 04:15:56 [WARN] file:/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/IDEALISE: skip missing optional source: namelist:idealise [WARN] file:/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/STASHC: skip missing optional source: namelist:exclude_package(:) [WARN] file:/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/RECONA: skip missing optional source: namelist:trans(:) [WARN] file:/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/IOSCNTL: skip missing optional source: namelist:lustre_control [WARN] file:/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/IOSCNTL: skip missing optional source: namelist:lustre_control_custom_files + echo 'ACCESS COUPLED MODEL DRIVER,' /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled + [[-z oasis3_mct]] + [[-z /home/272/jt0319/cylc-run/u-cy339/share/mom/exec/access-cm2/ACCESS-CM/fms_ACCESS-CM.x]] + ATMOS_LINK=toyatm + OCEAN_LINK=mom5xx + ICE_LINK=cicexx + ln -sf /home/272/jt0319/cylc-run/u-cy339/share/fcm_make_um/build-atmos/bin/um-atmos.exe toyatm + ln -sf /home/272/jt0319/cylc-run/u-cy339/share/mom/exec/access-cm2/ACCESS-CM/fms_ACCESS-CM.x mom5xx + ln -sf /home/272/jt0319/cylc-run/u-cy339/share/cice/bin/cice5.exe cicexx + ATMOS_EXEC=toyatm + OCEAN_EXEC=mom5xx + export UM_NPES=576 + UM_NPES=576 + NPROC_MAX=576 + export OCN_NPES=80 + OCN_NPES=80 + TOT_NPES=672 + HIST_FILE=cy339.xhist + fix_cice_namelist.py /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR/cice_in.nml /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR/input_ice.nml + [[0 != 0]] + fix_mom_namelist.py /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR/input.nml + [[0 != 0]] + chmod u+w /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/CPL_RUNDIR/namcouple + fix_namcouple.py /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/CPL_RUNDIR/namcouple + [[0 != 0]] + chmod u+w /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR/INPUT/diag_table + fix_diag_table.py /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR/INPUT/diag_table + [[0 != 0]] + mkdir -p /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR/RESTART /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR/HISTORY + mkdir -p /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR/RESTART /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR/HISTORY + [[09500101 != 09500101]] + [[true == \t\r\u\e]] + [[true == \f\a\l\s\e]] + [[true == \t\r\u\e]] + [[09500101 == 09500101]] + echo 'Setting CONTINUE=false for WARM_RESTART_RUN' + export CONTINUE=false + CONTINUE=false + create_rankfile.py + export 'ACCESSRUNCMD=--rankfile /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/rankfile -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR -n 576 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/toyatm : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR -n 80 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/mom5xx : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR -n 16 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/cicexx' + ACCESSRUNCMD='--rankfile /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/rankfile -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR -n 576 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/toyatm : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR -n 80 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/mom5xx : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR -n 16 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/cicexx' + echo RUNCOMMAND, --rankfile /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/rankfile -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR -n 576 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/toyatm : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR -n 80 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/mom5xx : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR -n 16 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/cicexx + cd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR + [[-z 10.6]] + [[! 10.6 =~ ^([0-9])+\.([0-9])+$ ]] + export DR_HOOK=false + DR_HOOK=false + export DR_HOOK_OPT=noself + DR_HOOK_OPT=noself + export PRINT_STATUS=PrStatus_Normal + PRINT_STATUS=PrStatus_Normal + export UM_THREAD_LEVEL=MULTIPLE + UM_THREAD_LEVEL=MULTIPLE + export HISTORY=/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/History_Data/cy339.xhist + HISTORY=/home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/History_Data/cy339.xhist + [[false == \f\a\l\s\e]] + rm -f /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/History_Data/cy339.xhist + export HISTORY_TEMP=thist + HISTORY_TEMP=thist + export UM_NPES=576 + UM_NPES=576 + export NPROC=576 + NPROC=576 + export HOUSEKEEP=hkfile + HOUSEKEEP=hkfile + export STASHC=STASHC + STASHC=STASHC + export ATMOSCNTL=ATMOSCNTL + ATMOSCNTL=ATMOSCNTL + export SHARED_NLIST=SHARED + SHARED_NLIST=SHARED + export ERROR_FLAG=errflag + ERROR_FLAG=errflag + export STASHMASTER=.. + STASHMASTER=.. + export IDEALISE=IDEALISE + IDEALISE=IDEALISE + export IOSCNTL=IOSCNTL + IOSCNTL=IOSCNTL + export STDOUT_FILE=pe_output/cy339.fort6.pe + STDOUT_FILE=pe_output/cy339.fort6.pe ++ dirname pe_output/cy339.fort6.pe + mkdir -p pe_output + rm -f pe_output/cy339.fort6.pe0 pe_output/cy339.fort6.pe000 + SIGNALS=EXIT + for S in $SIGNALS + trap FINALLY EXIT + export OMPI_MCA_hwloc_base_mem_alloc_policy=local_only + OMPI_MCA_hwloc_base_mem_alloc_policy=local_only + export OMPI_MCA_rmaps_base_mapping_policy= + OMPI_MCA_rmaps_base_mapping_policy= + mpirun --rankfile /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/rankfile -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR -n 576 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/toyatm : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/OCN_RUNDIR -n 80 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/mom5xx : -wd /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/ICE_RUNDIR -n 16 /home/272/jt0319/cylc-run/u-cy339/work/09500101/coupled/cicexx oasis_init_comp: Calling MPI_Init ``` Cheers, Joel ---
**Author:** ![Scott](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/scott/32/37_2.png) [@Scott](https://forum.access-hive.org.au/u/Scott)\ **Post date:** [26 February 2026 05:40 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/2 "2026-02-26T05:40:08Z")
What does this file look like around this line number? > [@Jatreutlein](#): > > `file /scratch/ng72/jt0319/cylc-run/u-cy339/work/09500101/coupled/ATM_RUNDIR/STASHC, line 2565` ---
**Author:** ![Jatreutlein](https://avatars.discourse-cdn.com/v4/letter/j/c89c15/32.png) [@Jatreutlein](https://forum.access-hive.org.au/u/Jatreutlein)\ **Post date:** [26 February 2026 05:48 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/3 "2026-02-26T05:48:21Z")
Here is what I found (I’ve added line numbers to the left side). Line 2565 that’s causing issues is ```auto l_spml_ts=.false. ``` Here is it in context: ```auto 2557/ 2558&domain 2559dom_name='PLEV19', 2560imn=0, 2561imsk=1, 2562iopa=1, 2563iopl=3, 2564iwt=0, 2565l_spml_ts=.false., 2566plt=0, 2567rlevlst=1000.000,925.000,850.000,700.000,600.000,500.000,400.000, 2568300.000,250.000,200.000,150.000,100.000,70.000,50.000, 256930.000,20.000,10.000,5.0,1.0, 2570spml_bot=0, 2571spml_ew=0, 2572spml_ns=0, 2573spml_top=0, 2574ts=.false., 2575/ ``` ---
**Author:** ![Scott](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/scott/32/37_2.png) [@Scott](https://forum.access-hive.org.au/u/Scott)\ **Post date:** [26 February 2026 05:58 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/4 "2026-02-26T05:58:07Z")
Nothing obviously wrong there - the variable’s present in the modern UM at [um/src/control/top\_level/rdbasis.F90#L155](https://github.com/MetOffice/um/blob/main/src/control/top_level/rdbasis.F90#L155). Probably will need someone familiar with CM2. ---
**Author:** ![Jatreutlein](https://avatars.discourse-cdn.com/v4/letter/j/c89c15/32.png) [@Jatreutlein](https://forum.access-hive.org.au/u/Jatreutlein)\ **Post date:** [2 March 2026 04:38 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/5 "2026-03-02T04:38:38Z")
Updating to say I refreshed the suite and didn’t click ‘auto-fix configurations’ this time which enabled it to run. The auto-fix seemed to have made some unnecessary changes. Thanks ---
**Author:** ![clairecarouge](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/clairecarouge/32/380_2.png) [@clairecarouge](https://forum.access-hive.org.au/u/clairecarouge)\ **Post date:** [2 March 2026 04:40 UTC](https://forum.access-hive.org.au/t/test-case-coupled-step-error-with-access-cm2/5989/6 "2026-03-02T04:40:38Z")
Good to know @Jatreutlein . I was just about to say I had run the test case successfully for more than a month and didn’t get any error.