Hi, I've searched the forum and net but can't find anything tht exactly explains how I can fix my problem. The closest I've come is this thread http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/92ccae0e-a764-49b5-a3a6-f0acd111372d I'm using Datepicker to pass date parameters to an MDX query. The Date Picker uses the format YYYY-MM-DDTHH:MI:SS e.g 2010-01-01T00:00:00 My Key is 20100101 I've tried various things but can't get it to transform the datepicker date correctly. Two examples below. Does anyone have any insight in to what else I could try. ( SELECT STRTOMEMBER("[Date].[Date].&[" + Format(CDate(@StartDateParam), "yyyyMMdd") + "]") : STRTOMEMBER("[Date].[Date].&[" + Format(CDate(@EndDateParam), "yyyyMMdd") + "]") ON COLUMNS And ( SELECT STRTOMEMBER("[Date].[Date].&[" + Format(@StartDateParam, "yyyyMMdd") + "]") : STRTOMEMBER("[Date].[Date].&[" + Format(@EndDateParam, "yyyyMMdd") + "]") ON COLUMNS Does anyone have any insight in to what else I could try. Thanks for your help

Hi, The expression you used is right. There is no MDX syntax error. To research further, you need provide more information here. In addition, you also can use Membervalue as datetime to do the comparision like this http://social.technet.microsoft.com/Forums/en-US/sqlanalysisservices/thread/b39afc70-d071-4903-b4b5-511b6e791f26 . thanks, Jerry