After opening a "debug" window in PL/SQL editor and pressing OK, nothing happens. The following error is thrown to logging page.
SEVERE 473 14064 oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$1 oracle.jdbc.proxy.oracle$1dbtools$1raptor$1proxy$1driver$1oracle$1RaptorProxyOJDBCConnection$2oracle$1jdbc$1internal$1OracleConnection$$$Proxy cannot be cast to oracle.jdbc.driver.PhysicalConnection at oracle.jdbc.driver.T2CConnection.createTemporaryClob(T2CConnection.java:3298)