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Use of dhtmlxTree and DataProcessor

I'm using your tree and dataprocessor-objects and when moving an item in the tree it seems that the php-file used for updating the database is never called. All I get is an error saying: this.obj.rowsAr is null or not an object, line 49 char 9.
It is very hard to debug and to find where it goes wrong. I'm logging some info in our database but nothing is written.
Version of dataprocessor is //v.1.0 build 80512, version of tree is //v.2.0 build 81009

Please don't use dhtmlxdataprocessor_debug.js with dhtmlxTree. It is purposed for the dhtmlxgrid only. 
In case of tree, you can enable debug output by 
     dp.enableDebug(true);