BDC Error

Hi

I m extending materials created in one Plant to other plants through Call transaction and batch input BDC methods.

it works fine in batch input method but gives a error message as

'The group data for the material HY2092002B00 is locked by SY-UNAME' in Call transaction MODE 'N' method. works fine in MODE 'A' as well.

Can someone help me solving the problem.

Regards

Mahesh