# Mule-convpp creating files of size 0 megabytes

**URL:** <https://cms-helpdesk.ncas.ac.uk/t/mule-convpp-creating-files-of-size-0-megabytes/893>\
**Category:** Uncategorized\
**Tags:** Monsoon2\
**Created:** [1 February 2023 12:02 UTC](https://cms-helpdesk.ncas.ac.uk/t/mule-convpp-creating-files-of-size-0-megabytes/893 "2023-02-01T12:02:41Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jamesbriant](https://avatars.discourse-cdn.com/v4/letter/j/f05b48/32.png) [@jamesbriant](https://cms-helpdesk.ncas.ac.uk/u/jamesbriant)\
**Post date:** [1 February 2023 12:02 UTC](https://cms-helpdesk.ncas.ac.uk/t/mule-convpp-creating-files-of-size-0-megabytes/893/1 "2023-02-01T12:02:41Z")

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# `mule-convpp` creating files of size 0 megabytes

I am trying to convert UM output files into pp files on Monsoon using `mule-convpp` from the um\_tools/2022.07.1/no-openmp module. However the resulting output files have size 0MB and `iris.load()` in python confirms there are no cubes in the converted pp file.

The suite I am using is u-bw256 by David Jackson running UM version 11.6. I have tried including the version information in the `mule-convpp --stashmaster` option but this has had no effect. (Should this be `--stashmaster 11.6` or `--stashmaster '11.6'`?)

My gut instinct tells me the original UM output files are either of a different format from what I’m expecting (I am struggling to understand the naming system of the outputs in the suite) or have somehow been corrupt after the UM simulation crashed. But I am unsure with how to proceed in solving this issue.

The files can be found in  
`/projects/phd-jbriant/jbriant/cylc-run/u-bw256/share/data/History_Data/`

Any help would be great!  
Thanks,  
James

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**Author:** ![grenville](https://dub1.discourse-cdn.com/flex013/user_avatar/cms-helpdesk.ncas.ac.uk/grenville/32/29_2.png) [@grenville](https://cms-helpdesk.ncas.ac.uk/u/grenville)\
**Post date:** [1 February 2023 12:18 UTC](https://cms-helpdesk.ncas.ac.uk/t/mule-convpp-creating-files-of-size-0-megabytes/893/2 "2023-02-01T12:18:42Z")

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James

`bw256a.pl20000911` is empty, as is `bw256a.pa20000911` (I think all the files are empty)

Maybe check the STASH settings for the suite.

Grenville