Issue Description

After upgrading to K2 Five (5.2), an error occurs when you attempt to execute a SmartObject method generated from a WCF Endpoint Service Instance. This occurs after you reboot the system.

Error Message

The following error occurs: “Value cannot be null. Parameter name: s.”


  1. Ensure you have K2 Five (5.2) installed.
  2. Download the K2 Five (5.2) FP5 from K2 Partner and Customer Portal.
  3. Install the K2 Five (5.2) FP5 to apply the fix.