# Senocular - Layout classes - Error: Ambiguous reference

**URL:** <https://forum.kirupa.com/t/senocular-layout-classes-error-ambiguous-reference/272010>\
**Category:** Uncategorized\
**Created:** [October 1, 2008, 9:34am UTC](https://forum.kirupa.com/t/senocular-layout-classes-error-ambiguous-reference/272010 "2008-10-01T09:34:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bzouchir](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/bzouchir/32/2088_2.png) [@bzouchir](https://forum.kirupa.com/u/bzouchir)\
**Post date:** [October 1, 2008, 9:34am UTC](https://forum.kirupa.com/t/senocular-layout-classes-error-ambiguous-reference/272010/1 "2008-10-01T09:34:31Z")

</div>

Senocular if you’re out here or if anyone has encountered this please help on this one.

I am using the Senocular’s layout classes to build this fluid layout.  
I am getting  
this error in the layoutConstraint class:

…src\com\senocular\display\LayoutConstraint.as(1035): col: 21 Error: Ambiguous reference to invalidate…  
/\*  
\* Invalidates this instance and its owner  
\*/  
private function invalidate():void {  
if (owner) owner.invalidate();  
invalid = true;  
}

what does that mean? where should i start looking?

thanks