This content has been marked as final. Show 1 reply
from your description it really feels like a security issue, even though the error message The Requested definition not found. does not give any hint what could be wrong.
Before changing anything I would first to try to understand the cause. Have you tried to see what's in the log? (see http://docs.oracle.com/cd/E23943_01/admin.1111/e12782/c11_troubleshooting.htm#CEGEJEAF )
If it does not provide any useful info, I'd use common sense - if one role works and the other don't, what's different? It can be security setting on searches as well as on applications.
The last tip: prior to deletion you may export your definition so that you may import it back, if necessary.