Crystal Reports: multiple parameter values in record selection filter

Question

I created a report with:

Parameter: buildingIds: String

Allow Multiple Values: True

Record Filter {WO.BL_ID} in [{?buildingIds}]

The designer gives me error: "An array cannot be an element of another array."

How do I pass multiple values for a parameter, that is used in "in list" filter?

Answer 1

You don't need the []:

 {WO.BL_ID} IN {?buildingIds}