I am assuming you are on Xbox so unable to make back up copies of your game. There is an existing thread regarding this issue which gives you some information about what's happening and what is being done to fix it, as well as a link to a player found workaround, which could help you avoid errors in the future. Be advised though, that the workaround is unofficial and does require you to delete data so exercise caution if you choose to use it. Many players swear by it though. https://7daystodie.com/forums/showthread.php?50175-Known-Issue-Terrain-Rewriting-(MD5-Issue)
I am level 19 in this game, mining again a narrow path 3 wide, was trying to build a base in a mountain side. The game has gotten so rediculously bad it is not worth playing. I had gone down only about 10 blocks at an angle, no warning, no odd frame rate, the screen went black. When I reloaded everything was gone and got the message your bedroll is missing. No kidding, everything is missing, it always takes the side with all your supplies and work benches. This has happened now on the last 7 games I have tried to play. Usually I get to level 50 though and just before level 51 it does it. Doesn’t matter seed name or terrain location. Would be nice if the Pimps cared about console players too.
The details of your game can matter - sometimes the trigger is something specific in a pre-made location, sometimes it's one object that could be scattered throughout the map. This is why we are asked for this information; the more we provide, the more likely they can replicate the fault and therefore fix it. Unfortunately, this issue does seem to be mostly on Xbox and without the backup facility available, the workaround is your best bet to avoid these errors in the future, which is why I provided the two links in an effort to speed things up for Clare, Ro and the rest of the team.
Was a Random-Gen map; Warrior, everything else standard but 18 hour days; single player. All my games are set up this way.
My builds are both in and not in a Prefab, it doesn’t matter. I happens the exact same way, with the exact same result. As I said before last 7 games started have ended this way, usually after level 50 or 51 and it always manages to be the side with all the workbenches and materials. Sorry for your loss.
Sorry to hear about your problem with the game. It sounds like you were hit by the infamous Terrain Rewrite/MD5 error. This error occurs when the game detects a problem during the autosave process and rewrites suspect files to day one status. A file represents a chunk of terrain approximately 16x16 locks from bedrock to upper limit, thus sometimes a base could be literally cut in half, part still intact, part gone. This is a known problem that the developers are working hard to fix. Unfortunately their are many triggers and although they have managed to eliminate a good many of them, new ones seem to pop up. If you would be willing to provide the details of your game and what you saw just before the crash happened that caused the rewrite, it could help the dev's find another trigger and fix it.
I understand when fixing bugs, details do matter but when people report something that happens online and off, self built homes and pre fabs, all different levels and characters you have to understand that asking someone to go through their broken game to look for settings is a bit much. Especially when you see someone reported the exact same bug from the same scenario over a year ago which still hasn't been fixed. Its hard too when it is obvious nothing is really being done to fix the problem or appears that way by the amount of complaints. I will never accept "trust me were working on it" as an acceptable answer for this long of time. As I stated in another post I actually have never publicly complained about a video game on any review site or forum of any sort, and I own No Mans Sky, but after trying to work with this game for some time now I felt I had to voice my opinion. I felt after searching the forum for answers and seeing the responses it comes across as a very arrogant and manipulative group who like to hide behind the "game under development" moniker. I also see the "unofficial" walkaround of wiping your hard drive when the game crashes once every hour doesn't seem to be working. It can be frustrating to feel like you are being put to work by the company you feel ripped off by only to have them blame the customers non complete information or even in some cases Microsoft. If you need help replicating the fault just buy a xbox and turn on 7 days, it will replicate, and your not frustrating an already frustrated customer.
Can I just make it clear that I am not a member of the staff for this forum, a mod, or part of the team behind the game. I'm just another player who's been here a while and occasionally tries to help out other players, the same way players on this forum have helped me out when I've had a problem. Frankly, when I see comments like this, I wonder why I bother.
How is it determined there are less occurrences of MD5? Is it based off less people reporting? I see a lot of people threatening to quit playing, so I just wonder if that could be the reason for less occurrences. I posted about my two back to back MD5s on a thread for terrain rewriting yesterday. I got pretty detailed. I have to wonder if my experience was because of my bunker at bedrock and my base above it competing for write space at the same elevation instead of 55 meters apart. I was driving through the desert once during a crash and reloaded with my bike a few feet below ground. I could see the icon and hear a crashing sound underground so I dug it out. Makes me think something is off with the elevation coding