"no new operations allowed until the active operation ends"
*Cause: An attempt was made to execute a new operation before the active
non-blocking operation completed or a new operation was attempted
before all the pieces of a column were inserted or fetched.
*Action: Execute the new operation after the non-blocking operation
completes. If piecewise binds/defines were done, execute the new
operation after all the pieces have been inserted or fetched.