Hi Venkat,
Does your Webi report uses a BEx query as data source?
If yes, then you will have to pass both Key and Text value for Material_Group.
You can go to BEx Explorer and check the output of BEx query. For example: If Key value is 001 and Text value is "Material", you will have to pass it as follows:
…lsSMSGV1=Material&lsIMSGV1=001
Your URL would be something like:
http://<serverHost>:8080/BOE/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=<DocumentID>&sType=wid&sRefresh=Y&token=<Cell ID of Flash Variable>&lsSGiven_Year=<CellID>&lsSMaterial_Group=<CellID>&lsIMSGV1=001
Make sure <CellID> is the Text value.
Regards,
Yuvraj