Dear All: OS: RH Linux 6.1 Zope: 2.1.6 Python: 1.5.2 Extra Products: ZOracleDA, FSSession, Document Template I just encountered a series of errors throwned out from my production Zope with type TransactionError. The coresponding error value says: """ A serious error, which was probably a system error, occurred in a previous database transaction. This application may be in an invalid state and must be restarted before database updates can be allowed. Beware though that if the error was due to a serious system problem, such as a disk full condition, then the application may not come up until you deal with the system problem. See your application log for information on the error that lead to this problem. """ The trace back did not say much: """ Traceback (innermost last): File /usr/local/Zope-2.1.6-src/lib/python/ZPublisher/Publish.py, line 169, in publish File /usr/local/Zope-2.1.6-src/lib/python/ZODB/Transaction.py, line 209, in commit TransactionError: A serious error, which was probably a system error, occurred in a previous database transaction. This application may be in an invalid state and must be restarted before database updates can be allowed. Beware though that if the error was due to a serious system problem, such as a disk full condition, then the application may not come up until you deal with the system problem. See your application log for information on the error that lead to this problem. """ I am almost clueless about this error, and it prevents the system from being accessed until zope is restarted. Please help!