"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.
*Comment: catproc.sql should load Probe by default, but it did not do so
in releases prior to 7.3.3.