Motorola MC45 scanner not responding.


I developed a scanner application for the device Motorola MC45.

But sometime for some of the devices the scanner getting stopped/not responding.

While I pulled the log files from the devices I observed that the devices are having the below mentioned exception.



System.ArgumentNullException: ArgumentNullException 

   at Symbol.Marshaller.SymbolMarshal.MarshalDwordTo(IntPtr pPtr, Int32 nOffset, UInt32 uValue) 

   at bp.o(ReaderData A_0) 

   at Symbol.Barcode.ReaderData.d(Object A_0) 

   at System.Threading.ThreadPool.WorkItem.doWork(Object o) 

   at System.Threading.Timer.ring()


Is there any specific reason for this exception?

How to prevent/handle these kind of exceptions?

After this issue how to enable the scanner again?

Thanks in advance.