Unhanded Exception on version 1.56.17

I've received an error with version 1.56.17

Unhandled Exception
Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at WGconsole.XmlSource..ctor (WGconsole.Config config) [0x00000] in <filename unknown>:0 
  at WGconsole.Program.ConsoleApplication (System.String[] args) [0x00000] in <filename unknown>:0 
Exception Message: Object reference not set to an instance of an object
Exception StackTrace:   at WGconsole.XmlSource..ctor (WGconsole.Config config) [0x00000] in <filename unknown>:0 
  at WGconsole.Program.ConsoleApplication (System.String[] args) [0x00000] in <filename unknown>:0 

It happends when the xml exists, for the initial creation work fine, but after second execution throws the error.

My config has 543 channels and is gathering the info form tvguide.co.uk, I've testet with old version (1.54.6/0.01) and everything works fine.

Atached my config file and log file.