zstandard error plus error saying water already taken

[JahanzebTariq]

Greetings professor @jgostick and @ma-sadeghi .. I currently ran into this error which I didn't encounter before. I ran the code 10 times but never got this error but I've been getting this error since yesterday... please address this issue

water = op.phase.Water(network=pn, name='water')
water.add_model_collection(op.models.collections.phase.water)
water.add_model_collection(op.models.collections.physics.basic)
water.regenerate_models()

please help me with this issue

[jgostick]

Usually when something like this happens, it's because you installed some other package, possibly unrelated to OpenPNM, and it updated/upgraded some dependency that it needed, which broke something else. The only real solution is to create a new virtual environment and reinstall openpnm.