SAP ECS BRF+ Rule Debugging from BAPI_ACC_DOCUMENT_POST

Hi Experts,

We have create a BRF+ Rule, showing a soft error in ECS and replacing the suspense trading partner value .When we create the FI document using BAPI_ACC_DOCUMENT_POST by passing the wrong trading partner value it is showing the soft error how ever when we see the posted document the trading partner is replacing with a blank value. Is there any way to debug this issue ?

Thanks,

Vijay