Migration from 2.1 to 4

Hello,
until today i used extjs 2.1, with which I developed a lot of code. Now, i would pass to the latest version, but when I run my pages with 4.0.7 version I received a lot of mistakes. I started analysis and I noticed that:
1) the new constructor is not used (replaced with Ext.create or definind xtype)
2) some packages are changed
3) ecc....
As I cannot rewrite all the code, I would like to know whether exists a wrapper or a line guides for the passage from the version 2.1 to the version 4.
Thanks

Moved to an Ext JS 4 forum.

I don’t rant but i have only indicated my problem explaining my exigency to recover my work and ask help to forum.
Thanks

Quote:

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Originally Posted by mimmo.rossi73

I don’t rant

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huh?

Excuse me, but i read quickly your message, now i notice that the phrase
"Rants don't get you anywhere. Let's talk as adults and professionals"
is in your signature...
:">

There is anyone that can help me?
:-/