BDOC with multiple vendors while using VMD_EI_API class

Hello,

I have a program that uses method VMD_EI_API=>MAINTAIN to update vendors data (XK02) in mass. (I call this method multiple times during execution)

The standart SAP system generates BDOCS to CRM system.

In normal times, each BDOC contains only one vendor but during mass update with VMD_EI_API=>MAINTAIN each BDOC contains multiple vendors and generates errors in CRM.

Any idea ?