Hi everyone. I’m trying to run the C5G7 Benchmark model, however I am encountering this error. I understand the issue has something to do with multi-group/continuous energy modes but I don’t know how to resolve it at all.
Any help would be greatly appreciated.
Hi @IRaheel and welcome to the community. The problem you’re encountering is due to a known bug. I just submitted a fix that should resolve this once merged.
In the meantime, if you just want to run the C5G7 model, you can remove the plotting commands that are causing problems.
Hello @paulromano. Thats perfect, thank you for resolving the issue!
I’m afraid I cant seem to continue on with the model as I am also getting this error. Would you be able to offer any guidance on this? Thank you
You need to make sure that:
- A
MGXSLibraryobject was exported toc5g7.h5 - You either have set
materials.cross_sections = 'c5g7.h5or set the environment variableOPENMC_MG_CROSS_SECTIONSto the absolute path of that file.
If you’re following the Multigroup Mode Part 1 notebook, this should have been done (exporting the file and setting the materials.cross_sections attribute).
Hmm this is what is baffling me. I have followed the Multigroup Mode Part 1 notebook exactly as it is and ensured both the things you mentioned have been set. Could it be that there is a file load error for mgxs.h5 that states ‘/tasks/mgxs.h5 is not UTF-8 encoded’ if i try to open the file?
Many thanks
.h5 files (HDF5 files) are binary files so there shouldn’t be any issues related to character encoding (which would only affect text files).
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