i declared <br />string variables<br />sum_string<br />fstring<br />fstring1<br /><br /><br />fixed relations:<br />sum_string = fstring+"+"+fstring1;<br /><br />view analyticCurve22<br />Y() is %sum_string%<br /><br /><br />strange it didn't work<br /><br />can take a look why? thanks!