ORA-06516

Title :

ORA-06516 PL/SQL: the Probe packages do not exist or are invalid

Cause :
A Probe operation, probably an attempt to initialize the Oracle server to debug PL/SQL, could not be completed because the Probe packages were not loaded or have become invalid.

Action :
DBA should load the Probe packages. This can be done by running the pBLOAD.SQL script supplied with the RDBMS.