UKCA run crashed

Hi,
My suite (u-do265) run well (e.g. for a month), however after I put some 3-hrly outputs for a few variables in model streams UPK and UP4, it crahsed after some time steps with eror message shown below:
Error from routine: STWORK
Error message: STWORK: Number of fields exceeds reserved headers for unit 13

Please help. Thanks

Best,
Xin

Xin

The UM training addresses this issue, see:

Grenville