Abinav,
We are SAP BI BI 4.1 SP3 and teh source is BEx query.
Child report works with '201404'month key.
Link is created on Unit Dimension.
Month Selection Key is imp.
Month format is : 06/2014, 07/2014, 08/2014,
="<a href=\"../../opendoc/openDocument.jsp?iDocID=ATU1bBrhxkNLg9QrYR5No&sIDType=CUID&sType=wid&sRefresh=Y&lsMZELM="+URLEncode(""+[1. Months Selected])+"&lsIZSELM="+URLEncode(""+[Months Selection Key])+"&lsMpmVPU="+URLEncode(""+[Unit Prompt])+"&lsIpmVPU="+URLEncode(""+[Unit Prompt Key])+"\" title=\"\" target=\"_blank\" nav=\"doc\">"+[Unit]+"</a>"
Nanda Kishore