Release : 17.0
Several of the metric names were changed with release 17.0
Review thresholds and state definitions set up for MQCHMSGR. In 17.0 that metric name was changed to MQCSMSGR and it's for the MQ_CHAN_MessagesRate.
Recommend reviewing the list of metric changes in the section titled "Metric Aliases" on the "Upgrade MQ Channel Exception" page of the SYSVIEW Performance Management 17.0 Installing manual.