validation in shopping cart

Hello all,

I have an requirement that i hav to put one validation while creating limit shopping cart.

I'm using BADI BBP_DOC_CHECK_BADI for this.

My issue is that after error is occured and user wants to correct that error. Again my code gets executed n and i'm getting same error again and again.

Can someone help me in that how can i achieve this functionality.

Thanks in advance.

regards,

Lokesh