I migrated the cmd tool from Cmd 250 to Cmd 258.
I did run: sencha app upgrade ../extjs-4.2.0

The app still work perfect.

Then started: sencha app build. The build ended with success with no errors.

But now the has problems. I see this error msg in Chrome:

Uncaught TypeError: Object [object Object] has no method 'isLocalRtl' all-classes.js:1

Does somebody know what the problem here is????

What is isLocalRtl???