ORA-01460: unimplemented or unreasonable conversion requested
Cause: You are passing more than 32Kb of data to either a CLOB or NCLOB parameter.
I'm looking for a workaround.
Update: Evidently, you have to insert a small record into the database, then open that row in an OracleDataReader using a "SELECT * FROM ___ FOR UPDATE," get the LOB and then stream into the LOB. Thanks to Sarkie for shortcutting my search.