Code Fix: K2 Workflow error occurs when sending emails

Issue Description

When you send emails in a loop using Item References, the K2 Workflow might go into an error state if the source data changes.

Error Message:

The following error occurs: “The email address 'System.String[]', is invalid”

Resolution

The fix is available in:

• K2 Five (5.3) January 2022 Cumulative Update Fix Pack 08.
• K2 Five (5.4) March 2022 Cumulative Update Fix Pack 07.
• K2 Five (5.5) March 2022 Cumulative Update Fix Pack 06.

1. Ensure you have the correct K2 version and/or Cumulative update installed. See KB001893 to see what Fix Pack level you have installed.
2. Download the latest Fix Pack using the links in the table above for the version you require.
3. Install the Fix Pack to apply the fix.