Oracle Enterprise Manager Jobs Failing Initialization

The Enterprise Manager jobs on our RAC system recently started intermittently failing initialization with the following error: > Error evaluating parameter sources/security checks/locks ORA-06508: > PL/SQL: could not find program unit being called We have tried bouncing DBConsole, re-submitting the job from the library and even recompiling the package being referenced. This is happening to multiple jobs with about one execution in every ten scheduled succeeding. Any ideas on what can be tried or checked? **Update:** I've opened a SR with Oracle.