https://www.ibm.com/docs/en/ims/15.5.0?topic=queues-avoiding-pseudoabend-u0830
IMS 15.5 - Communications and connections - Avoiding pseudoabend U0830
When an MSC network and an IMSplex with shared queues coexist, errors can occur if you remove IMS systems from, or add them to, the IMSplex or MSC network...
imscommunicationsconnectionsavoiding