RmResource and strongly-typed resources

Hi,
I followed the indications from https://fim2010client.codeplex.com/wikipage?title=UsingOwnStronglyTypedResources&referringTitle=Documentation
to produce a partial class to access my customized Resource Person (just one new attribute for test), but I'm having an error:

fim-resource.ps1:181 char:36
+         Multivalued = [bool]::Parse <<<< ($(GetAttributeValue $exportObject "Multivalued"));
    + CategoryInfo          : NotSpecified: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : DotNetMethodException

Note: I get the same error with an uncostomized resource like Group or Set

I'm using FIM 2010 R2. Is this tool valid for RFIM 2010 R2?

Many, many thanks,

DD