CAUSE: This error can occur when the file requested in an Upload instruction is moved or deleted from the ThingWorx Platform while it is being uploaded. Since the Upload instruction always tells the agent to compress the file before uploading, deleting or moving the requested file on the agent device during an upload has no effect; the compressed file is uploaded, not the original file.

RESOLUTION: To ensure an Upload instruction succeeds, do not move or delete files that may be referenced by packages. If another user has access to a file that is included in a package, make sure the user knows that the file should not be moved or deleted until the upload completes successfully.