Can't bind input parameter to Calc View's SQL with $$param$$ notation

Dear all,

Not sure if I am missing something, but I just can't seem to get my SELECT statement working with an input parameter using $$field$$ notation.

I have a Calc View with this. Simply a select statement from an AV to count the entries.

var_out = SELECT FIELD1, FIELD2, 1 as "COUNT"

FROM "_SYS_BIC"."playpen/AT_VIEW"

(PLACEHOLDER."$$FIELD2$$" = '1234' );

I need to use the $$FIELD2$$ notation because I am using Explorer which requires it.

I checked the document "Using SAP HANA Variables and Parameters in SAP BusinessObjects BI4.0" but this just does not help at all.

I cannot be this hard, I must me missing something.

Does it have to be in a Procedure ?

Thanks in advanced