[CLOSED] Generic error "Ext is undefined" which occurs across the application.

[MarginPoint]

There is a generic error been raised "Ext is undefined" in some of the browsers like IE when we navigate across the application due to which some of the times screens does not load and the show mask messages keep running and the error is inconsistent. We are unable to reproduce this on the google chrome.
So Please help us with the issue.

[Vladimir]

Such error occurs only if ExtJS resource files are not loaded correctly
You need monitor requests (in Fiddler, by example) and check status code and text for response (by default, ext.axd is used)
When you see "Ext is undefined" error check ext.axd requests for last page and post here (status code and text of response)