Oracle 12c Error ora-03137 the malformed TTC package from the client was rejected

Yesterday afternoon, the implementation reported an Oracle error ora-03137

said that the database in 11g no problem, upgrade to 12c, the error.

Local debugging, see after executing SQL, reported exception, as follows:

Execute SQL in a 12c database, no problem.

The suspicion is that ASP. NET connection oralce12c When a problem, just a check, but found that now with 12c is not too little, the information on the internet is too little. Only on my own,

Because we are connecting oralce12c with Odp.net. The first thought is upgrade, database upgrade, we also upgrade.

Once the upgrade is complete, find that the problem has been solved so happily.

Deliberately looked at the updated log:

As Oracle has discovered this problem, it has made an update.

Oracle 12c Error ora-03137 the malformed TTC package from the client was rejected