Cause
An attempt was made to use LOB from a temporary table whose data has been dropped either because table was transaction-specific and transaction has commited or aborted, table was truncated or session which created this LOB has ended.
An attempt was made to use LOB from a temporary table whose data has been dropped either because table was transaction-specific and transaction has commited or aborted, table was truncated or session which created this LOB has ended.
do not attempt to access the temporary table until the concurrent transaction has committed or aborted.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12700.htm
https://community.oracle.com/message/3697174
https://community.oracle.com/message/4346288
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