Multicast topic string is too long

If the IBM MQ Multicast topic string is rejected with reason code MQRC_TOPIC_STRING_ERROR, it might be because the string is too long.

WebSphere MQ Multicast has a 255 character limit for topic strings. This limitation means that care must be taken with the names of nodes and leaf-nodes within the tree; if the names of nodes and leaf-nodes are too long, the topic string might exceed 255 characters and return the 2425 (0979) (RC2425): MQRC_TOPIC_STRING_ERROR reason code. It is recommended to make topic strings as short as possible because longer topic strings might have a detrimental effect on performance.