Call Transaction using VL01N

Hi,

I am doing a call transaction using VL01N and getting a subrc of 1001. When I tried creating delivery manually I was able to create it successfully. Also once I created the delivery and again ran the BDC it is not giving errors still giving success with subrc of 1001. Can anyone help me on this its really urgent and not able to figure out whats going wrong?

Thanks,

David.