XSPEC Error, Cannot Find APEC files

Helpdesk
1

I’m trying to run XSPEC with an APEC model and I am getting the following error:

Cannot find any APEC files corresponding to 3.1.2
continuing to use those from
***calcMultiTempPlasma : failure in calcCIESpectrum, status = 1

I’m using PyXSPEC in a Jupyter notebook in the SAS environment.

2

Thanks for reporting this. It appears that the init file lists an older apec version that isn’t installed alongside the model you’re using. We’ll look into it more closely. In the meantime, you can try following the instructions at How do I fix my apec version?.

4

I suspect that if you delete the .xspec folder in your home directory (assuming you don’t have any custom settings in your Xspec.init file) then the next time you run XSPEC this issue will be fixed.

APEC 3.1.2 tables were removed from the XSPEC model files with the HEASoft 6.36 release due to some problems with the data, so anything pointing to those files is going to cause an error. As we were previously providing HEASoft 6.35.2 on Fornax, your current XSPEC init must be left over from that.

We’ll try to think about how to avoid this problem in the future.

6

@djturner deleting the .xspec folder fixed the issue.

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