KeyError when running NIRSpec

[cabridelle]

I am getting the following error when running NIRSpec with any filter:
"Unknown key format {} value {} listed in {}".format(kfe, value_lookup[kfe],
KeyError: 'readmode'

I have updated pandeia and pandexo, but from what I can tell 'readmode' is not listed anywhere in instrument.py. Could this be the problem?

[natashabatalha]

This is likely an issue with having incompatible Pandeia refdata, Pandeia the code, and PandExo the code.

Currently you should have:

pandeia-engine      1.6           pypi_0  pypi
pandexo-engine      1.5.3          pypi_0  pypi

Along with this documentation: https://stsci.app.box.com/v/pandeia-refdata-v1p6