Attempting to update attachment keywords without including a file when using the ArcGIS REST API in ArcGIS Enterprise returns the error message, "Unable to find uploaded item information. null".

Solution de contournement

In order for the operation to be successful, a file must be included in the POST request for the Update Attachment operation. Another alternative is to host the feature layer in ArcGIS Online if there is a need to update attachment keywords without re-uploading the file.

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