ERROR : 21000-REND-RegenerateMaps – Unspecified failure

Third-party renderers, like Arnold or Maxwell, don’t support rendermap so you’ll get this error if you try to do a rendermap. In a recent case, the customer told us that he figured out that “the Maxwell render add-on was causing a conflict. Any old models I made with the add-on installed were affected, but new models created without the add on will bake textures just fine.”