# Error when trying to calculate openmc.deplete

**URL:** <https://openmc.discourse.group/t/error-when-trying-to-calculate-openmc-deplete/5990>\
**Category:** User Support\
**Created:** [September 9, 2025, 4:19pm UTC](https://openmc.discourse.group/t/error-when-trying-to-calculate-openmc-deplete/5990 "2025-09-09T16:19:26Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![albottar](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@albottar](https://openmc.discourse.group/u/albottar)\
**Post date:** [September 9, 2025, 4:19pm UTC](https://openmc.discourse.group/t/error-when-trying-to-calculate-openmc-deplete/5990/1 "2025-09-09T16:19:26Z")

</div>

Hello everyone, I’m quite new to OpenMC, and I’m facing a problem.I recently built a fairly large model of the reactor core and conducted several tests. There were absolutely no troubles with this, but now I’m constantly running into this problem with simplified chain:

```auto
chain = Chain.from_xml("/work/openmc_data/endfb-viii.0-hdf5/chain_endfb80_sfr(1).xml")

```

```auto
keep = ['Pu239']

```

```auto
small_chain = chain.reduce(keep, level=0)

```

`No energy reported from OpenMC tallies. Do your HDF5 files have heating data?`  
`Abort(1) on node 0 (rank 0 in comm 0): application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0 openmc`

What’s interesting, when I’m using chain that’s level 1 or above its completely ok. Can someone explain to me, how I can fix it? I’m using endfb data pack, and working in Docker on Windows11