I have a parameter in my report for which the user can select 1 or multiple values If i make it a multivalued parameter and run the report i get the following error: Operator & is not defined for string and type object() What can be done to fix this?

Hi florence, To check the parameter default values, make sure the value item like this [Customer].[Country].&[Australia]. Generarally, if it is gerenrated automatically by report designer wizard, there is no problem. So, please post the values or expression here for the parameter default values for further resaerch. thanks, Jerry