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When a Windows Communication Foundation (WCF) method return parameter is assigned a null value, an exception occurs.
“An object cannot be null”.
- Ensure you have K2 4.7 installed.
- Download and install the K2 4.7 May 2017 Cumulative Update from K2 Partner and Customer Portal.
- Get the K2 4.7 May 2017 Cumulative Update FP1 from Regional Support.
- Install the K2 4.7 May 2017 Cumulative Update FP1 to apply the fix.