# Errors when adding output variables in ACCESS-rAM3: NetCDF: Index exceeds dimension bound **URL:** \ **Category:** General\ **Tags:** help, netcdf, access-ram3\ **Created:** [18 August 2025 06:34 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797 "2025-08-18T06:34:10Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![qinggangg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/qinggangg/32/4460_2.png) [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Post date:** [18 August 2025 06:34 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/1 "2025-08-18T06:34:10Z")
Hello Has anyone got the following error message before (within directory $reg\_$res\_GAL9\_um\_fcst\_000)? I got it when I try to add more output variables in ACCESS-rAM3 simulations. I am adding tens of variables so not sure which one cause the problem (I am trying to identify it). Would you have some idea about the possible cause of this error? > ??? > ???!!!???!!!???!!!???!!!???!!! ERROR ???!!!???!!!???!!!???!!!???!!! > ? Error code: 40 > ? Error from routine: NC\_PUT\_VAR\_REAL\_1D > ? Error message: NetCDF: Index exceeds dimension bound : NF90\_PUT\_VAR > ? Error from processor: 0 > ? Error number: 93 > ??? There is also another error message in the job.out file: > [1755496769.314044] [gadi-cpu-clx-0424:250531:0] ucc\_context.c:399 UCC ERROR failed to create tl context for nccl Regards, Qinggang ---
**Author:** ![qinggangg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/qinggangg/32/4460_2.png) [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Post date:** [18 August 2025 12:27 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/2 "2025-08-18T12:27:36Z")
I find the error results from this set of eight variables: UPWARD SW FLUX ON LEVELS, DOWNWARD SW FLUX ON LEVELS, CLEAR-SKY UPWARD SW FLUX ON LEVELS, CLEAR-SKY DOWNWARD SW FLUX ON LEVELS UPWARD LW FLUX ON LEVELS, DOWNWARD LW FLUX ON LEVELS, CLEAR-SKY UPWARD LW FLUX ON LEVELS, CLEAR-SKY DOWNWARD LW FLUX ON LEVELS ---
**Author:** ![cbengel](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@cbengel](https://forum.access-hive.org.au/u/cbengel)\ **Post date:** [19 August 2025 01:08 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/3 "2025-08-19T01:08:17Z")
Hi @qinggangg, it might be that you need to extend the number of records allowed into your output file. Have you made a new output stream? If so, my first piece of advice would be to look at the settings for the “\_pb” stream in app/um/opt/rose-app-stashpack6.conf and copy the reinit settings from there into your stream. If you did not create a new stream, please come back and I will ask a few more questions. ---
**Author:** ![helen](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/helen/32/2840_2.png) [@helen](https://forum.access-hive.org.au/u/helen)\ **Post date:** [19 August 2025 01:23 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/4 "2025-08-19T01:23:32Z")
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**Author:** ![qinggangg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/qinggangg/32/4460_2.png) [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Post date:** [19 August 2025 04:39 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/5 "2025-08-19T04:39:52Z")
Hi @cbengel, thank you. I can output more other variables, but only these eight cause the problem. I do not make a new output stream. In addition, I tried to add more variables from COSP satellite simulators (see [COSP](https://www.cfmip.org/tools-and-data/cosp)), but all values are zero from all the COSP variables. Does ACCESS-rAM3 support COSP simulators now? ---
**Author:** ![cbengel](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@cbengel](https://forum.access-hive.org.au/u/cbengel)\ **Post date:** [19 August 2025 04:43 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/6 "2025-08-19T04:43:35Z")
Hi @qinggangg, I wonder if the problem is related to the netcdf output. Are you open to working with FieldsFile output? If so, you could switch to the u-dg768/access\_rel\_1\_ff branch. Is that something you would be open to trying? In regards to COSP, I haven’t heard of anyone here using the COSP simulators. I will have to get back to you on whether that is possible with the u-dg768 suite. ---
**Author:** ![qinggangg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/qinggangg/32/4460_2.png) [@qinggangg](https://forum.access-hive.org.au/u/qinggangg)\ **Post date:** [19 August 2025 04:51 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/7 "2025-08-19T04:51:12Z")
Hi @cbengel Thank you. I think I am fine without these variables for now. If I would like it later, I may try FieldsFile. I would love to hear the update about COSP with ACCESS-rAM3. ---
**Author:** ![griff](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/griff/32/332_2.png) [@griff](https://forum.access-hive.org.au/u/griff)\ **Post date:** [19 August 2025 05:11 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/8 "2025-08-19T05:11:22Z")
I have had this error when I try to write a X by Y variable into Y by X space. It can also happen trying to write a U (cell edge) grid into a T (cell centered) grid. Given the number of permutations to the possible error, it is unlikely that we will be able to guess the correct answer for what the problem is. I offer this as a potential mental jog for you to find the right direction in your solution. ---
**Author:** ![bethanwhite](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.access-hive.org.au/bethanwhite/32/3080_2.png) [@bethanwhite](https://forum.access-hive.org.au/u/bethanwhite)\ **Post date:** [19 August 2025 11:33 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/9 "2025-08-19T11:33:00Z")
@cbengel running the COSP simulators is definitely something the Centre wants the capability to do. We can take the discussion off this thread but I am keen to implement this if it isn’t already. ---
**Author:** ![cbengel](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@cbengel](https://forum.access-hive.org.au/u/cbengel)\ **Post date:** [19 August 2025 23:16 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/10 "2025-08-19T23:16:58Z")
Hi @qinggangg, @griff and @bethanwhite, There is a mix of issues going on here that we can work on offline. I will close the topic for now, but will report back once when we find a working solution (to COSP and the other variables). ---
**Author:** ![cbengel](https://avatars.discourse-cdn.com/v4/letter/c/ce7236/32.png) [@cbengel](https://forum.access-hive.org.au/u/cbengel)\ **Post date:** [19 August 2025 23:17 UTC](https://forum.access-hive.org.au/t/errors-when-adding-output-variables-in-access-ram3-netcdf-index-exceeds-dimension-bound/4797/11 "2025-08-19T23:17:02Z")