AX 2009 EP - Sys.ArgumentNullException: Value cannot be null

Hi

If during click on a date picker appear this error :

 Sys.ArgumentNullException: Value cannot be null.

 Parameter name: panelsDeleting[0]

The reason is the Debug active !
You have to open the web.config file and search the line :

compilation batch=”false” debug=”true“

Replace with

compilation batch=”false” debug=”false“

Enjoy