The {2} expression for the {0} {1}' refers to the {3} {4}'. Expressions can only refer to a {3} declared within the same ...

The {2} expression for the {0} ‘{1}' refers to the {3} ‘{4}'. Expressions can only refer to a {3} declared within the same grouping scope, a containing grouping scope, or those declared on the report. Letters in the names of variables must use the correct case.