<{{Subtitle_Weight}} class="prominent-subhead {{Show_Subtitle}}"> {{Header_Subtitle}}

Code Fix: An error occurs when executing a Rest Service Add method to add a serialized value

This article has been archived, and/or refers to legacy products, components or features. The content in this article is offered "as is" and will no longer be updated. Archived content is provided for reference purposes only. This content does not infer that the product, component or feature is supported, or that the product, component or feature will continue to function as described herein.

Issue Description

When executing the Add method for a Rest Endpoint Service to add a serialized value to the Smartobject, an error occurs.

Error Message

The following errors occur: “code 400 exception” or “code 500 exception”


  1. Ensure you have K2 Five RTM installed.
  2. Get the K2 Five RTM FP28 from Regional Support.
  3. Install the K2 Five RTM FP28 to apply the fix.


After applying the Fix Pack the REST service instance must be refreshed and the SmartObjects must be regenerated.