Hi again !

When I check your screenshot I can see that Tableau activity is actually logged under your user and the staging steps seem to succeed.

In other words, Tableau created a temporary volume, uploads a CSV into /Volumes/... and drops the volume. So I think the issue may not be the initial SQL connection or staging table creation.

Canyou please filter query history by failed Tableau queries around the exact timestamp?

If you don't find any failed SQL query the error may be happening outside QH, possibly during the final write step, UC volume access, external location or simply the ODBC/REST call.