Error When Alternating Background Color In Table Rows

Hi All,
I have a table containing 21 columns. I want to alternate the color on the rows, to make it more radable and nocer to the eye. As such I set the BackgroundColor property on the entire TableRow (so it is applied to every textbox) to the following:




Code Snippet
=iif(RowNumber(nothing)Mod 2,"LightGray","White")





In theory it should work. I checked a few of the texboxes to make sure everything was okay and indeed the BackgroundColor property on each one of them was properly set to the above expression.

When I tried to build the report, I was prompted by 21 errors (one per textbox) stating the following:



[rsCompilerErrorInExpression] The BackgroundColor expression for the textbox 'FIELDNAME' contains an error: [BC30455] Argument not specified for parameter 'TruePart' of 'Public Function IIf(Expression As Boolean, TruePart As Object, FalsePart As Object) As Object'.


Obviously the TruePart parameter has been specified ("LightGray" in my expression), so what could be wrong??

Thanks in advance for the help

Idelso