Error om closing extjs window with panel or formpanel

[taxidriver]

After closing an ext-Window which contains an ext-FormPanel or ext-Panel I get the error message "b.getPositionEl().dom is undefined".

The weird thing is that this error does not occur when the ext-window contains only ext-Toolbars or when the ext-window configuration option "modal" is set to be "false".

I'd appreciate any suggestion.

Thanks in advance!

[taxidriver]

Finally I found the solution!

The problem was that the FormPanel and the Panel were instantiating with an ID that was already used in my code somewhere.

My new question is that if there is a smart (ext)way to set different unique ID's to ext components

[fay]

Ext.id()

Generates unique ids. If the element already has an id, it is unchanged.

[taxidriver]

Thank you fay!!!

Your suggestion has worked!