I have this Formula, I am changing the database for the report.

Old Formula
{quote.lifecycle_status} in ["LOSTQUOTE", "QUOTE"] and
{quote.date_effective} = {?Quote Eff Dates}


New Formula Field is a NVARCHAR
{quote.lifecycle_status} in ["LOSTQUOTE", "QUOTE"] and
{quote.date_eff_ccyymm} = {?Quote Eff Dates}

I am getting String Required here at {?Quote Eff Dates}

Please help.