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Best practice for either uploading a (single) file or deleting the currently uploaded one

Best practice for either uploading a (single) file or deleting the currently uploaded one
  1. Why can't I upload a document?

Why can't I upload a document?

Your file may be corrupted, which means there are metadata issues in the file that occurred during original document generation, scanning, or some other conversion process, has produced an invalid PDF (i.e., one that doesn't conform to PDF structure standards).

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