# ExtJS Exception - Effect.Morph is not a construction

**URL:** <https://www.ruby-forum.com/t/extjs-exception-effect-morph-is-not-a-construction/126787>\
**Category:** Rails\
**Created:** [January 22, 2008, 7:37am UTC](https://www.ruby-forum.com/t/extjs-exception-effect-morph-is-not-a-construction/126787 "2008-01-22T07:37:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![karthikeyan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/898d66/32.png) [@karthikeyan](https://www.ruby-forum.com/u/karthikeyan)\
**Post date:** [January 22, 2008, 7:37am UTC](https://www.ruby-forum.com/t/extjs-exception-effect-morph-is-not-a-construction/126787/1 "2008-01-22T07:37:36Z")

</div>

Hi,

I am using ExtJS in my application. I am getting the following  
javascript error.

“Effect.Morph is not a constructor”

The application was working well yesterday. But today I am getting this  
error. I didn’t change anything in the code. I don know why I am getting  
this error.

Any suggestion is appreciated.

Thanks in advance.

- Karthik.