LSMW for Asset Transfer: No Batch Input data for screen SAPLAMDP 0100

Created LSMW for Asset Transfer (Transaction ABUMN)

If the input file has single record then I don't see any error, but if it has multiple records then I am getting the following error:

No batch input data for screen SAPLAMDP 0100

I verified the screen recording and field mapping a zillion times. No inconsistency.

Looking at different forums I see for some transactions Batch Input runs differently in background and foreground. Apparently it accesses screens in different sequence.

Has anyone faced this problem? I know we can go with BDC, but has anyone found success with LSMW?

Appreciate if anyone can share their experiences.

Thanks,