Segment Code

Question

Hi, we have been facing an issue with Union activity when we added a Segment Code in it.The workflow does not fail but it logs out an error message: " Cannot extract '0' characters from the position -1 in the string". Does anybody have any explanation for this?

MeitMedia · Answer

Hi @sanjana12 ,

The error message suggests that there’s an issue related to string operations within the activity, possibly linked to the Segment Code you’ve added. Here’s a step-by-step approach to diagnose and resolve this issue:

Verify the Segment Code you’ve added. Ensure that it’s correctly formatted and that it does not contain any syntax errors or invalid characters. Sometimes, errors in the segment code can lead to unexpected issues in activities.
Make sure that the data schema used in the Union activity is correctly defined. Check that the fields and data types are consistent between the sources you are trying to union.
Ensure that all the fields being mapped in the Union activity are correctly matched and that there are no mismatches. Any discrepancies in field names or data types can cause issues.
Temporarily remove the Segment Code to see if the Union activity works without it. If it does, the issue is likely with the Segment Code. You can then reintroduce parts of the Segment Code incrementally to identify the problematic segment.
Look for any fields that might have null or empty values. Sometimes, operations expecting non-null values might fail if they encounter nulls or empty strings.

By systematically troubleshooting these areas, you should be able to identify and resolve the issue with the Union activity.

Best regards,

MEIT MEDIA (https://www.meitmedia.com)

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