Hello Keith,

I ran the radiative.par example of WavetoyX fine. I added Z4c to the thorn list and it says again. Error: Thorn Z4c not found.

I reloaded and updated everything, but still get the issue. The machine is a DGX Spark running Ubuntu. I appreciate any suggestions.

One guess into the blue: when you added the thorn to your thornlist, assuming you had used GetComponents on a thornlist that did not list the thorn, did you at that point also set up a symbolic link from arrangements/SpacetimeX/Z4c to ../../repos/SpacetimeX/Z4c ? And is that link valid, ie does actually point to the correct location?

Should look something like this:

$ ls -l arrangements/SpacetimeX/ total 8 lrwxrwxrwx 1 rhaas rhaas 30 Apr 17 2025 NewRadX -> ../../repos/SpacetimeX/NewRadX lrwxrwxrwx 1 rhaas rhaas 27 Jan 20 07:09 Z4c -> ../../repos/SpacetimeX/Z4c

Yours, Roland