3177   Fetched block type does not match expected type

Cause

This error occurs if the type field in a disk block does not match the expected type. This would normally indicate a physical file corruption.

Action

If feasible, retain a copy of the corrupted database for analysis. Restore the database from a checked backup and then perform a roll‑forward recovery to reapply committed transactions applied since the backup. If your Jade licenses include support, contact your local Jade support center for assistance with root cause analysis.