idoc creation problem urgent...

I have a 2 deliveries which has same sold to party 138. The output type defined is ZLDO which is EDI processing. The deliveries are created by batch job.

Partner profile is maintained correctly as well condition record also exits for this partner 138.

But for 1st delivery the IDOC got created correctly and everything is fine.

for second delivery no output was triggered...no Idoc created.

I am enable to find out what is wrong with other delivery..

how should I find???

Please help....its urgent.