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I have a Property display with some fields to fill. One in specific calls FieldName.
I put a Validator to validate with a parameter called FieldName that the user just fill it with some text like "Action Code" no "actioncode" or something diffrent, just the String.
and my expresion is like this.
if(FieldName == "Action Code") {result: true;} { result: false;}
What PTC's software are you using here?