issue with cl_bcs in function module

Hi Experts,

I have created function module using cl_bcs with cl_documents_bcs for attaching HTM body of mail form and then sending email.

this is successful with one of case where mail got registered under SOST,

in other case where if I have mail ids for CC then mail not got registered under SOST. If I execute the same code in SE38 for same data then it got successful, any idea which are parameters effecting this?

actually I am using commit work also.

Thanks.

VijInd