# The error `push.checksum`

**environment**: something the run needs is missing or different where it runs (a package, a file, a device, the network): the error names what to install, fetch or attach.

Where MIME gives it, with what its message says happened and what its action says to do (`{…}` is filled in from the experiment):

- in `mime/push/_draft.py`:
  - what happened: `{…}: after {…} uploads, {…}: the draft does not hold the file push sent, and its entry was deleted`
  - what to do: `run the same command again, 'mime push <folder> --to <service>'; what was uploaded and verified is not sent again`
- in `mime/push/_plan.py`:
  - what happened: `the copy of the asset {…} at {…} is not its bytes (sha256 {…}, and the lock names {…})`
  - what to do: `hash the cache again, 'mime assets check', and fetch it again, 'mime assets fetch {…}'`

Reading an error and reaching its full traceback: [reading an error](../reading_errors.md). Every code: [the index](index.md).