That issue has been reported here: https://github.com/OHDSI/Achilles/issues/359 and they are currently working on a fix.
Thanks. Is this specific to multi-threading or heel? I guess I’ll wait on the patch and re-install the achilles package.
No, not related to multi threading, it has something to do with (I think) heel analysis. You might be able to sidestep the error by setting the runHeel = FALSE, however, i’m not totally sure that it will avoid the error, so please forgive me if you try and it does not work.