                     if (field.argValue.isSet)
                     {
                         throw new FormatTokenError(
-                            "< flag cannot be used with position specifier",
+                            "Flag '<' cannot be used with position specifier",
                             token.substr(i, 1));
                     }
                     else

    private function parseFlags():void
    {
        var token:Token = lexer.nextToken();
        var setFlags:Set = new Set();
        var char:String;

        if (token.text)

            catch (re:RangeError)
            {
                throw new PrecisionRangeError(
                    "Number following '.' must be in the range 0,20 for fixed formatting");
            }
            break;

