could not resolve <esri:visibleLayers> to a component implementation

[__1]

There is an error in my app."could not resolve <esri:visibleLayers> to a component implementation"

hope you can help me.
Thank you!

[RobertScheitlin__GISP]

jmuguy,

   Can you post the code that shows how and where you are trying to use this?

[__1]

I solved the problem with your tips.The place i used it was false,when i correct it,it works.
Thank you very much!