MOPs Forums

When using Fetch Att in Mops, im getting this error in Solver. Just checking if this is due to wrong version.

Using H20.5.445 with MOPS Fetch_Attribute::1.0 build 2022/07/20

Invalid source ./dopimport_geometry/load_each_field_end.
(Error: The sub-network output operator failed to cook: ./dopimport_geometry/switch3
Error: Invalid source ./dopimport_geometry/load_a_field.
(Error: Unable to evaluate expression (
(/obj/geo1/vellumsolver1/dopnet1/forces/mops_Fetch_Attribute/chk/switch1/input)).)..).
Unable to cook the test input.

Invalid source ./dopimport_constraints/load_each_field_end.
(Error: The sub-network output operator failed to cook: ./dopimport_constraints/switch3
Error: Invalid source ./dopimport_constraints/load_a_field.
(Error: Unable to evaluate expression (
(/obj/geo1/vellumsolver1/dopnet1/forces/mops_Fetch_Attribute/chk/switch1/input)).)..).

This error is usually caused by a Python version mismatch. Make sure that the Python version for MOPs Plus matches the version of Python you're using in Houdini (for 20.5 it's typically 3.11).

for 20.5 I can only find py310 and it's not working. Any idea how to proceed from here?

Invalid source ./dopimport_geometry/load_each_field_end.
(Error: The sub-network output operator failed to cook: ./dopimport_geometry/switch3
Error: Invalid source ./dopimport_geometry/load_a_field.
(Error: Unable to evaluate expression (
(/obj/geo1/vellumsolver1/dopnet1/forces/mops_Fetch_Attribute/chk/switch1/input)).)..).
Unable to cook the test input.

If you can't see any available Python 3.11 builds, it's possible your subscription lapsed before July 2024? Python 3.11 compatibility was added to MOPs Plus shortly after Houdini 20.5 released, on 2024-07-10. You're only entitled to download builds released within one year of your last subscription renewal.

If that's not the case, please let me know and I'll try to figure out what's going wrong.

You're right. I will need to renew my subscription. Thank you.