oleDB connection: getting exception querying MDX from C# -


please: receive following exception when trying run code:

object reference not set instance of object...

using (oledbconnection conn = new oledbconnection(@"provider=msolap.4; data source=<mysource>; initial catalog=analysis componetreport;"))         {             conn.open();             var mdxquery = new stringbuilder();             mdxquery.append("select non empty { [measures].[afr] } on columns, [dim_component_basic].[kp mat nr].children on rows (select [dim_component_basic].[kp mat nr].&[" + partnumber + "] on columns [cub componenten])");             using (oledbcommand cmd = new oledbcommand(mdxquery.tostring(), conn))             {                 //dataset ds = new dataset();                 //ds.enforceconstraints = false;                 //ds.tables.add();                 datatable dt = new datatable();                 dt.load(cmd.executereader());                  try                 {                     part.partnumber = dt.rows[0][0].tostring();

the error occured @ dt.load(cmd.executereader())); part.

now: swear same code worked 2 days ago. , if change oledb part adomd works well.

however can't use adomd connection because don't want use windows authentification.


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