Automatic document number assignment while import of CAD structure in SAP PLM ECTR to SOLIDWORKS

Hi,

Is there any option for automatic document number assignment while import of CAD structure in SAP PLM ECTR to SOLIDWORKS.

Currently I set the value as master in DType under <Document_create,    assuming that the document number will be taken from the filename of the SLDPRT/SLDASM original..

But it is not..

Any suggestions...

Thanks

Arun Prasad