CTD in one, particular place - possibly a terrain-related bug

[TheMurderousCricket 5,061]

Hi all,

I have just experienced a really peculiar bug which causes the game to surprisingly CTD.

The crash always happens when I attempt to lay down a zone which runs through the tile that I crossed in the following picture, for the viewers convenience. Regardless of what is being zoned there, the game freezes up for a moment and then crashes.

What makes this situation really bonkers is the fact that a slight alteration of this tile's height (for instance, running water pipes underneath), completely solves the issue, making the tile usable again.

I keep wondering if the SAM corner over there is not the root of the problem. This particular place could have been a pattern-based, SAM-type gentle bend - I don't remember now. I'm not sure how it works, but perhaps the game interprets that a SAM pattern piece is still there and causes conflict as a result...?

I'm gonna try to place more zones in areas like this and perhaps I will be able to reproduce the results (though I certainly hope I would not!).

Can anyone shed some light on what is wrong in this particular case? I might actually share the city where this problem appears, should anyone would like to investigate and test it out for themselves.

[Leo -- 186]

Yeah I had the same issue several times before. From my testing it seems to be some sort of conflict with the road leveling the terrain and the zone tool also attempting the same thing.

[TheMurderousCricket 5,061]

Thanks @Leo --. It's good to know that this, at least, is not an isolated case.

I believe you are correct. This spot has been influenced and flattened by the SAM network first. So it seems like a case of "XY fighting" no doubt.

[rsc204 21,836]

SAM is a street override, so whatever is going on is nothing that is controlled by the SAM mod, it would affect regular streets also. Note too, you are not actually using any kind of WRC here either.

On 16/09/2022 at 1:52 AM, Leo -- said:

From my testing it seems to be some sort of conflict with the road leveling the terrain and the zone tool also attempting the same thing.

Consider for a moment, that at any given time you are using only one or the other tool, how could both happen at the same time?

I've known of situations where the underlying save data somehow gets a corrupted value, but honestly in that case even altering the height would give a CTD, literally doing anything in such a tile does. Far more likely what has happened is that you have some conflicting values in a 'slope mod', so when the zoning being added needs to alter the terrain, it can't within the values that are set and the game can't resolve the calculation = CTD. Try temporarily removing any slope mod you may have that affects streets, that'd be the most likely culprit. Be especially careful to check you don't have more than one "Street Placement Tuning Parameters" Exemplar in your Plugins. Conflicting slope mods cause CTDs, but note that not only slope mods alter the same Exemplar, although for the street network I can't think off-hand of anything other than Slope Mods that are out there on the exchanges.

You can quickly verify if you have such an Exemplar in Plugins, if multiples exist and in which files by following the procedure shown here, using this special dat file:

~Placement Tuning Parameters.dat

Note this file will also flag the same exemplars for the other networks too, for street you only need concern yourself with the Exemplar ID 0x492A03A3.

[TheMurderousCricket 5,061]

On 18.09.2022 at 5:19 PM, rsc204 said:

I've known of situations where the underlying save data somehow gets a corrupted value, but honestly in that case even altering the height would give a CTD, literally doing anything in such a tile does. Far more likely what has happened is that you have some conflicting values in a 'slope mod'

The thing is I don't have and never had any slope mods.

Besides, changing the tile's height completely resolves the issue.