Factorio Forums

NOTE: This only happened once, and I can't reproduce it, and it has been fixed, since. But here's what I remember:

* I was building out a series of poles & roboports to a new area on Nauvus
* Things were proceeding as expected, then...
* Suddenly, all construction stopped.
* I looked near home-base, 500+ construction robots availble, same-number total in network.
* I checked that all my roboports were connected, with no gaps, they were.
* I tried to read robot-statistics out at the "end of the line" (where new construction was expected), but it was not in the GUI.
* I figured out that I had to drop a [ghost] inserter, green-wire it to the roboport, then I could read robo-stats.

...As soon as I ghosted-down the inserter, suddenly 50+ construction bots sprang to life and started working again.
Adding greenwire & reading robo-stats confirmed.
Waiting a few minutes, they all showed up and continued as they should have.

No idea what caused the stall, but it was there. Now fixed. I don't have a stalled save-game. If you want my save-game anyway, please let me know where to find it on MacOS (latest).

Cheers!

#magic
#cannotReproduce

Ok, it happened again. This time, I saved it off as "Construction-stalled". (But I still don't know where that file is!)

507 available, 507 idle, construction needing to be done, lots of power poles, lasers & roboports in storage.

Ok, I'm not very good at this psychic debugging thing, but my wild-guess is: The area being developed is quite far away, and the robots' A* (or whatever algorithm they use) for finding a path bails after not-enough hops.

If that is, indeed, the issue, I suggest that they do something along the lines of: "If I found a point substantially closer than where I started, try again from that point". (I realize that can lead to bad loops, hence "something along the lines of..." )