This a common error that we see when we use a HttpAction in an Integration Procedure.



We see this error usually when we are calling a DataRaptor action before our HttpAction, or making a DML operation before a Http Action.

The Reason:

• The Salesforce platform prohibits Data Manipulation Language (DML) operations before HTTP external callouts. Therefore, if an HTTP Action follows a DataRaptor Post Action we encounter this error.

Fix:

• Enable Chain On Step for the DataRaptor Post Action. Do this to avoid the Salesforce error indicating you have uncommitted work pending.
  

If you are testing it in preview mode under Option change “chainable” to true.



And if you call the Integration Procedure from a OmniScript then you need to check the “Chainable” option under Remote Properties of Integration Procedure Action.




Resource:
2. Video: https://youtu.be/ZOk3TtHNIN4