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000644: Duplicate IDs found in <value>.

Description

The unique ID field specified contains one or more duplicate values. Each record needs to be associated with a uniquely different ID to match results to corresponding input features.

Solution

If your dataset doesn't have a unique ID field, you can create one. First, add a new field to your input dataset that is of type LONG or SHORT. Then, use the Calculate Field tool to set the new field values to the FID or ObjectID field values.