# The error `asset.offline`

**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/assets/_fetch.py`:
  - what happened: `{…} {…} and {…} is set, so nothing is downloaded (the cache is {…})`
  - what to do: `fetch it on a machine with network access and copy the file to {…}, then run ''{…}'' again (it hashes the file and downloads nothing), or unset {…}`
- in `mime/assets/_fetch.py`:
  - what happened: `{…} is not cached, and {…} is set, so nothing is downloaded`
  - what to do: `unset {…} ('unset {…}'), or pass the file you copied here`
- in `mime/saved/_pull.py`:
  - what happened: `{…} is not on this machine, and {…} is set, so nothing is downloaded`
  - what to do: `unset {…}, or give the bundle as a file: 'mime pull <file>'`

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