Factorio Forums

What did you do?

Built a lot of roboports/radars/poles/lasers in a grid using bots, some were over cliffs. During that build, my cliff explosives ran out.

What happened?

Some builds over cliffs got stuck forever, even when new cliff explosives were produced.

What did you expect to happen instead? It might be obvious to you, but do it anyway!

Once cliff explosives were available, the cliffs are automatically destroyed by bots, then the roboport etc ghosts are built.

Does it happen always, once, or sometimes?

I've only seen it once, but it happened to a few different roboports.

This first happened while I was running 2.0.41, and persisted in 2.0.42.

Save game: https://www.sendspace.com/file/4z1wby

Do you know of any way to reproduce this from before the cliff got marked for deconstruction?

Actually, we figured out how to reproduce it. It's now fixed for the next release.

Thanks, I appreciate the quick fix! It was annoying to try and find all the stuck cliffs.

I am seeing this recently on a 2.1 save. I am not 100% certain if the scenario for this is exactly the same as described, but I have hundreds of cliff explosives in a Passive Provider on Vulcanus, and lots of cliffs are marked, but none of them are being exploded.

I initially thought it had something to do with platforms overhead requesting cliff explosives, but this is happening even with all platforms gone from Vulcanus.

I have a surplus of construction bots on Vulcanus. The explosives have been sitting there for a while now - maybe close to an hour of play that I've been aware of the issue.

On 2.1.17

darthruneis wrote: Mon Aug 31, 2026 4:18 am I am seeing this recently on a 2.1 save. I am not 100% certain if the scenario for this is exactly the same as described, but I have hundreds of cliff explosives in a Passive Provider on Vulcanus, and lots of cliffs are marked, but none of them are being exploded.

Please make a new bug report and provide a save file.