I'm having an issue with the Substance COP (v463). As soon as I plug in one a file or merge op, I get a segmentation fault. It happens with the .sbsar posted on sidefx.com/tutorials/sci-fi-core
and with any other Substance Designer (2020.1.2) file I export and tried in Houdini (18.0.460 and 463) with the Labs Substance Archive node. Is this working for you guys?