Sometimes, at high altitudes, the vacuum force holding down the media will be lower, therefore the media will not be held in place properly causing:

Ink Smearing on the Media.

Printhead crashes against the Media.

Cut Sheet loading problems (high probability).

Roll Media loading problems (low probability).

The solution to this would be to change the Vacuum force by changing the Altitude setting. This can be done via the front panel / Set-up Menu / Altitude.