Disconnect in Testrequest to iSeries, eServer i5, or System i5 on Telnet 5250

Executing a Testrequest function when connected to an iSeries™, eServer™ i5, or System i5™ might cause the session to be disconnected. If you experience this problem, make sure that OS/400® APAR MA15053 has been applied on the iSeries™, eServer™ i5, or System i5™.