PJM
I googled MQCONN 2012 and got this link
Have a read of the info in there
It looks like something in your environment changed since the last run?
Or you are taking PROGA from ENVIRONA and trying to run it on ENVIRONB?
if the latter then did the preparation of the executable run without error or warning?
I have only used MQ on IBM mainframes but once you get the hang of it, including the trouble-shoooting, it is quite straight forward and works well
paulseawind
Bali - Indonesia