Hi @Lizzie – apologies for the delay and thanks for uploading your files! There have been a few moving parts in terms of updates in the analysis 3 environment and the regional mom6 environments which have created some issues. I think we are past these now but the first thing we need to do is to make sure we are all on the same page with what version we are using. Can I please get you to recreate the input files using analysis3-25.05 and the notebook created by @mmr0 here (also, see Madi’s post here). These are relatively up-to date and what I plan to use. No guarantees this fixes the issue – but I think it is a good place to start - please report back if you get the same or a different bug.