Simple expression syntax error (checking decimal parameter value)

I’m trying to make a simple conditional visibility expression, based on the value of decimal parameter: $currentObject/value > 0.00 But I’m getting this error:  Operator > not supported in expression >(, 0) Error: An error occurred while evaluating visibility expression: Operator > not supported in expression >(, 0) How can I fix it? It seems to be a syntax error.