i link: a!documentDownloadLink(document: fv!item.appianDocId ),
used the above two lines to download a document but it does not download , it open a tab with a message error : { "error": "APNX-1-0000-000", "message": "Invalid Content ID", "title": "An Error Has Occurred"}
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Is that value in appianDocId a valid document id?
Yes it seems like it's saving the appianDocId in the database correctly
You just shared this minimal code snippet. I cannot help you much without more context.
Did you check the actual values in that data you seem to iterate on?
Did you try doing todocument with that docId in an expression rule?