# ACCESS-AM2 BUILD error **URL:** \ **Category:** Atmosphere\ **Tags:** help, um, error, access-am2\ **Created:** [8 August 2025 06:15 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780 "2025-08-08T06:15:45Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![alanah.chapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/alanah.chapman/32/4377_2.png) [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Post date:** [8 August 2025 06:15 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/1 "2025-08-08T06:15:45Z")
Hi 🙂 I am setting up an ACCESS-AM2 model run, and I have gotten an error in the BUILD –\> fcm\_make\_um step. I need to compile from source, but I have gotten this error: ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/7/781e7eb7a0a659b1c56add081ab74b9c5d4f93fa.jpeg) Having a closer look within the suite (u-dn941): ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/3/39e6ec53e56a9dbf9847b33125f77e6aca2dab63.jpeg) I’m not sure how to fix this, so if anyone has any ideas they would be greatly appreciated ! (sorry for a late Friday afternoon post) Cheers, Alanah ---
**Author:** ![Paul.Gregory](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/paul.gregory/32/2566_2.png) [@Paul.Gregory](https://forum.access-hive.org.au/u/Paul.Gregory)\ **Post date:** [8 August 2025 06:47 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/2 "2025-08-08T06:47:25Z")
Hi Alanah. This looks like a bash error, i.e. the environment variable OPENMP doesn’t have a value assigned to it at compile time. In the build script for the rAM3 task `fcm_make_um`, the value of openmp in `app/um/rose-app.conf` is hardwired to true. ```auto openmp=true ``` If you set that in your rose-suite.conf, it should compile. You’ll then have to figure out why the environment variable that should be assigned a value in your suite is empty. ---
**Author:** ![alanah.chapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/alanah.chapman/32/4377_2.png) [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Post date:** [9 August 2025 01:02 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/3 "2025-08-09T01:02:25Z")
Thanks Paul! That fixed the error and its compiled! ---
**Author:** ![alanah.chapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/alanah.chapman/32/4377_2.png) [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Post date:** [9 August 2025 01:14 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/4 "2025-08-09T01:14:34Z")
So it successfully compiled! but now is failing in the atmos step - which I think is still related to openmp? This is the first error in the job.err file: ![image](https://us1.discourse-cdn.com/flex020/uploads/access1/original/2X/3/320fbd047e54a0fbd5af0666f8bc8f3ddf5d4abc.png) With some more detail below: ```plaintext [0] exceptions: An non-exception application exit occured.[0] exceptions: whilst in a serial region[0] exceptions: Task had pid=109914 on host gadi-cpu-clx-2955.gadi.nci.org.au[0] exceptions: Program is “/home/563/ac9768/cylc-run/u-dn941/share/fcm_make_um/build-atmos/bin/um-atmos.exe”Warning in umPrintMgr: umPrintExceptionHandler : Handler Invokedgc_abort (Processor 0): Job aborted from ereport. ``` ```plaintext MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLDwith errorcode 9. ``` ```auto NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.You may or may not see output from other processes, depending onexactly when Open MPI kills them. ``` ```auto [gadi-cpu-clx-2955.gadi.nci.org.au:109801] PMIX ERROR: UNREACHABLE in file /jobfs/35249569.gadi-pbs/0/openmpi/4.0.2/source/openmpi-4.0.2/opal/mca/pmix/pmix3x/pmix/src/server/pmix_server.c at line 2147 ``` Do you think this could be related to setting openmp=true ? ---
**Author:** ![Paul.Gregory](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/paul.gregory/32/2566_2.png) [@Paul.Gregory](https://forum.access-hive.org.au/u/Paul.Gregory)\ **Post date:** [11 August 2025 00:19 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/5 "2025-08-11T00:19:03Z")
I don’t think so. You have compiled with OMP support but it doesn’t mean you are using it at runtime. In the rAM3 suite you have to activate it by setting ```auto UM_ATM_OMP=2 ``` in `site/nci-gadi/suite-adds.rc` MPI\_ABORT is a generic message whenever your MPI process fails/exits. The error suggests you have incorrect values in the RUN\_Nudging nameless section of the UM configuration file. i.e. this section in `/app/um/rose-suite.conf` ```auto [namelist:run_nudging] l_nudging=.false. !!ndg_analysis_source= !!ndg_datapath='' !!ndg_hours_perdata= !!ndg_lev_bottom= !!ndg_lev_top=0 !!ndg_on_lev_bottom=0 !!ndg_on_lev_top=0 !!ndg_relax_tvalue=0 !!ndg_relax_uvalue=0 !!ndg_relax_vvalue=0 !!ndg_strat_fac=1.0 ``` Are you trying to run with nudging or not? ---
**Author:** ![alanah.chapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/alanah.chapman/32/4377_2.png) [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Post date:** [11 August 2025 01:12 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/6 "2025-08-11T01:12:13Z")
Ok, in that case it probably is an issue with RUN\_Nudging. I am trying to run with nudging, but the suite I am using hasn’t been setup to work with ERA5 - although it is possible to run the nudging with ERA5 (done by Fiddes et al 2024); I’ll double check that we’ve set it up properly! We set `l_nudging=.true.`, and `ndg_analysis_source=4` (which isn’t defined), so that could be the problem. Thanks Paul! ---
**Author:** ![alanah.chapman](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/alanah.chapman/32/4377_2.png) [@alanah.chapman](https://forum.access-hive.org.au/u/alanah.chapman)\ **Post date:** [11 August 2025 02:10 UTC](https://forum.access-hive.org.au/t/access-am2-build-error/4780/7 "2025-08-11T02:10:13Z")
Had a typo in the `ndg_datapath` ! So this error… is fixed 🙂