After some digging finally found out the answer.
I need to use the following command:
imqcmd list msg -t t -n my_topic -nocheck
where my_topic is the name of my topic destination.
After receiving a response like:
Listing messages for the destination
------------------------------------
Destination Name Destination Type
------------------------------------
my_queue Topic
On the broker specified by:
-------------------------
Host Primary Port
-------------------------
localhost 7676
--------------------------------------------------------------------------------------------------
Message # Message IDs Priority Body Type
--------------------------------------------------------------------------------------------------
0 ID:9-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169630 4 TextMessage
1 ID:10-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169709 4 TextMessage
2 ID:11-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169717 4 TextMessage
3 ID:12-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169720 4 TextMessage
4 ID:13-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169723 4 TextMessage
5 ID:14-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169727 4 TextMessage
I can view Message details with this command:
imqcmd query msg -t t -n my_topic -msgID "ID:9-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169630" -nocheck
which willl print something like:
Querying message:
------------------------------------------------------------
Message ID
------------------------------------------------------------
ID:9-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169630
In the destination
------------------------------------
Destination Name Destination Type
------------------------------------
my_topic Topic
On the broker specified by:
-------------------------
Host Primary Port
-------------------------
localhost 7676
--------------------------
Message Header Information
--------------------------
Message ID ID:9-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169630
Correlation ID TestCorrID
Destination Name my_topic
Destination Type Topic
Delivery Mode PERSISTENT (2)
Priority 4
Redelivered false
Timestamp 7/30/08 3:32:49 PM
Type
Expiration 12/31/69 4:00:00 PM
ReplyTo Destination Name temporary_destination://topic/AAA.BBB.CCC.DDD/58798/1
ReplyTo Destination Type
------------------------------
Message Properties Information
------------------------------
LongProp 6534
IntProp 3
StringProp TestStringValue
DoubleProp 7.4687643E7
------------------------
Message Body Information
------------------------
Body Type TextMessage (1)
Afterwards the message can be deleted with command:
imqcmd destroy msg -t t -n my_topic-msgID "ID:9-AAA.BBB.CCC.DDD(e9:3b:c8:51:8b:75)-58798-1217457169630" -nocheck
Hope this helps someone, someday...