R418 – The $MQSI marker in using a character that is not allowed

The $MQSI marker in using a character that is not allowed ‘(^ $ . | \\ < > ? + * = & [ ] ( )’ (WMB)

The details can be extracted using the following command:
mqsireadbar -b BARfiles\TestMQSIBar1.bar -r

There are more details available here.