You are trying to extract Opportunity Notes using data source CODOPPNOTESB, and the data gets truncated in BW system. In C4C you defined the field to show 1024 characters, however the BW extractor shows the corresponding field with only 60 characters.
If you already applied SAP Note: 2307166 - 740SP16 on your BW system and the issue still persists, it should be checked further by BW support.
Note that as BW related issues are beyond the scope of C4C / SAP Cloud Support Services, it should be addressed with BW team.
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