I'm getting "Couldn't establish connection. Reason code:2018(MQRC_HCONN_ERROR)" while connecting to IBM MQ. What could be the reason ?

I'm getting "Couldn't establish connection. Reason code:2018(MQRC_HCONN_ERROR)" while connecting to IBM MQ. What could be the reason ?

This error usually comes together with 2009 error code ( MQRC_CONNECTION_BROKEN ). 

Refer the IBM documentation to fix this.