Excel 2007 : Issue with Custom data parameter in Excel Data Connection

Hello,

We are querying a OLAP (SSAS 2008) cube using Excel 2007 by creating a data connection to SSAS server with an extended parameter “Custom Data”. We are using custom data parameter to apply our application’s user security to filter dimension members in Excel’s pivot table report. We have created a pivot table in Excel and the excel is including this custom data parameter along with each request that excel is submitting to SSAS.

However, when the user selects “Show Properties in Report” option for a dimension which is selected in Row-axis of pivot table, Excel is not including custom data parameter . Why this “Custom Data” parameter is not being included in the request only for this specific case?

1. The Request which sent from Excel to SSAS when user clicks on “Show Properties in Report” option
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Header><Session xmlns="urn:schemas-microsoft-com:xml-analysis" SessionId="AE6B294B-4983-4010-BC5F-E0896A49ECD9"/></soap:Header><soap:Body><Discover xmlns="urn:schemas-microsoft-com:xml-analysis"><RequestType>DISCOVER_LITERALS</RequestType><Restrictions/><Properties><PropertyList><Content>SchemaData</Content><Format>Tabular</Format></PropertyList></Properties></Discover></soap:Body></soap:Envelope>

2. The sample Request which sent from Excel to SSAS for all other requests
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Header><Session xmlns="urn:schemas-microsoft-com:xml-analysis" SessionId="74165AD6-C240-4634-92A1-61A400A3FC97"/></soap:Header><soap:Body><Discover xmlns="urn:schemas-microsoft-com:xml-analysis"><RequestType>MDSCHEMA_CUBES</RequestType><Restrictions><RestrictionList><CUBE_NAME>RepCube</CUBE_NAME></RestrictionList></Restrictions><Properties><PropertyList><Catalog>QAV10_12thMay2010</Catalog><Timeout>5000</Timeout><SafetyOptions>2</SafetyOptions><MdxMissingMemberMode>Error</MdxMissingMemberMode><LocaleIdentifier>1033</LocaleIdentifier><DbpropMsmdMDXCompatibility>1</DbpropMsmdMDXCompatibility><CustomData>xxxxxx</CustomData></PropertyList></Properties></Discover></soap:Body></soap:Envelope>

As the Custom Data parameter is missing in 1st request our application logic is throwing a custom exception to Excel and Excel is not able to understand the exception message. Excel is sending the same request repeatedly (going into infinite loop) and the excel window is freezed. Not able to work with excel until restarting the Excel.

Can anyone help me to resolve the above? quick help is much appriciated!

Thanks,
Venkat