Google is your friend. Googling
mqje001: reason code 2030 returns on the first page this hit:
http://www-01.ibm.com/support/docview.w ... wg21154055 which starts off
2030 MQRC MSG TOO BIG FOR Q
Technote (troubleshooting)
Problem(Abstract)
MQPUT fails and you receive the following:
2030 X’07EE’ MQRC_MSG_TOO_BIG_FOR_Q
Cause
The message length exceeds the maxmsgl specified in the WebSphere MQ queue manager, queue and channel definitions.
Resolving the problem
The queue manager, queue and channel must have maxmsgl set to be large enough to hold your messages.
1.Alter the queue manager maxmsgl.
2.Alter the queue maxmsgl.
3.Alter the channel maxmsgl.
and it proceeds to give the commands needed to change the three queue maximum message lengths. Since you only mentioned one in your post, I suspect you haven't changed everything that needs changing.