When XI receive a lot of Idocs (about 8000) of R/3, sometime one has the following error in the queue (SMQ2): "<i>The ABAP/4 Open SQL array insert results in dupl.</i>".
Thus corresponding queue is in error and is blocked. After one has the posssibility to re-execute (in fact Debug LUW), and data are sent.
Have you the same problem?
Is there a solution?
P.S: There is an OSS note (584601 of 08.01.2003), but it's already integrated into our XI 3.0 (SP9).