I had a sample cube and tried an OLAP report. Tried using a filter on a measure with the logical operator '<' but it would always give some syntax error on the underlying mdx is generated. Anybody had similar problems or is this a problem in the eval version ?
I could not reproduce your problem. I have created a report on demo server ([url]http://128.171.208.112/ReportPortal/login.asp[/url]) under the Foodmart folder called "Sundar". It is using the following formula expression: [Measures].[Unit Sales]<5000