Mysterious ORA-01013: user requested cancel of current operation

I am getting the above error using SQLExecDirect to perform an entire table update which requires about 90 seconds to execute. I bumped up the timeout from 60 to 300 with no effect, but if I don't set a timeout then the query runs to completion without incident.

Is this a known issue with the ODBC driver (8.0.3.2) or am I missing another possibility?

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Randy Baker (remove Z from address in email replies)