@rex we’re having an issue very similar to this: https://github.com/dagster-io/dagster/issues/4487 We have a solid that uses the Python

multiprocessing

library to spawn child processes. Is there something we’re missing? We thought we could use any valid Python in our solids.

In the mean time you can try the workarounds listed on the issue, or installing the local code as a package instead of depending on working directory path resolution

pip install -e

or less sure about

conda develop