I dunno if it's something caused by your map pack or not, but I've never encountered this particular thing before...
http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=881806712
This small town is completely flooded by ankle-deep water.

Looking through my launch.log I spotted these:
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics.LightBeam.Materials.T_EV_DustPanner_01'! Referenced by 'SLM_Overpass_56x16_02_Doc.TheWorld:PersistentLevel' ('---').
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics': Can't find file for package 'EngineVolumetrics' while loading NULL
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics.LightBeam.Materials.T_EV_LightBeam_Falloff_01'! Referenced by 'SLM_Overpass_56x16_02_Doc.TheWorld:PersistentLevel' ('---').
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics': Can't find file for package 'EngineVolumetrics' while loading NULL
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics.LightBeam.Materials.T_EV_LightBeam_Falloff_02'! Referenced by 'SLM_Overpass_56x16_02_Doc.TheWorld:PersistentLevel' ('---').
[0037.36] Warning: Warning, Failed to load 'EngineVolumetrics': Can't find file for package 'EngineVolumetrics' while loading NULL
and
[0038.58] Warning: Warning, Failed to load 'TrashBag.Textures.TrashBag_NORM'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel' ('---').
[0038.58] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
[0038.58] Warning: Warning, Failed to load 'TrashBag.Textures.TrashBag_DIFF'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel' ('---').
[0038.58] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
[0038.58] Warning: Warning, Failed to load 'TrashBag.Textures.TrashBag_SPEC'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel' ('---').
[0038.58] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
and
[0038.59] Warning: Warning, Failed to load 'TrashBag.Meshes.TrashBagGroup_A'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel.XComLevelActor_10.StaticMeshComponent_27' ('Engine.StaticMeshComponent:StaticMesh').
[0038.59] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
[0038.59] Warning: Warning, Failed to load 'TrashBag.Meshes.TrashBagGroup_A'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel.XComLevelActor_8.StaticMeshComponent_25' ('Engine.StaticMeshComponent:StaticMesh').
[0038.59] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
[0038.59] Warning: Warning, Failed to load 'TrashBag.Meshes.TrashBagGroup_A'! Referenced by 'SLM_Blvd_Str_16x16_10_Doc.TheWorld:PersistentLevel.XComLevelActor_9.StaticMeshComponent_26' ('Engine.StaticMeshComponent:StaticMesh').
[0038.59] Warning: Warning, Failed to load 'TrashBag': Can't find file for package 'TrashBag' while loading NULL
And same errors for the Trashbag but for "SLM_Blvd_Str_16x08_04_Doc"

And something else which may be relevant:
[0041.22] Warning: Redscreen: Unable to determine destructible actor dimensions for "plot_SLM_MdObj_Transit_EMM_01.TheWorld:SLM_Overpass_56x16_02_Doc_26.XComDestructibleActor_257"
[0041.22] Warning: Redscreen: Unable to determine destructible actor dimensions for "plot_SLM_MdObj_Transit_EMM_01.TheWorld:SLM_Overpass_56x16_02_Doc_26.XComDestructibleActor_56"
[0041.23] Warning: Redscreen: Unable to determine destructible actor dimensions for "plot_SLM_MdObj_Transit_EMM_01.TheWorld:SLM_Overpass_56x16_06_Doc_29.XComDestructibleActor_156"
[0041.23] Warning: Redscreen: Unable to determine destructible actor dimensions for "plot_SLM_MdObj_Transit_EMM_01.TheWorld:SLM_Overpass_56x16_06_Doc_29.XComDestructibleActor_161"
[0041.23] Warning: Redscreen: Unable to determine destructible actor dimensions for "plot_SLM_MdObj_Transit_EMM_01.TheWorld:SLM_Overpass_56x16_06_Doc_29.XComDestructibleActor_93"
[0041.23] Warning: Redscreen: Destructible Actor 'VEH_Semi_5x2_On_295.XComDestructibleActor_0' from Archetype 'ARC_Semi_A' has a location (pivot) that does not match up with tile occupancy. Pivot should be closer to the bounds of destructible. ~RussellA

thanks

A few other launch.log errors. Not sure if the last one is relevant to this PCP pack but it's bunch with others with " _Doc" in the name...

[1111.94] Warning: Redscreen: Destructible Actor 'SLM_Blvd_T_16x16_07_Doc_107.XComDestructibleActor_4' from Archetype 'ARC_VEH_ACV_DEST' has a location (pivot) that does not match up with tile occupancy. Pivot should be closer to the bounds of destructible. ~RussellA
[1111.94] Warning: Redscreen: Destructible Actor 'SLM_Blvd_T_16x16_07_Doc_107.XComDestructibleActor_5' from Archetype 'ARC_VEH_ACV_DEST' has a location (pivot) that does not match up with tile occupancy. Pivot should be closer to the bounds of destructible. ~RussellA
[1111.94] Warning: Redscreen: Destructible Actor 'SLM_Blvd_T_16x16_07_Doc_107.XComDestructibleActor_3' from Archetype 'ARC_VEH_ACV_DEST' has a location (pivot) that does not match up with tile occupancy. Pivot should be closer to the bounds of destructible. ~RussellA
[1111.94] Warning: Redscreen: Destructible Actor 'AdventCopCar_4x2_Open_298.XComDestructibleActor_12' from Archetype 'ARC_AdventCopCarOpen' has a location (pivot) that does not match up with tile occupancy. Pivot should be closer to the bounds of destructible. ~RussellA

I'd have to run those files and have a look. But my guess is, that those errors come from their original counterparts. If you go and open the original PCP's, some of them drop a huge list of erros on you, that can't realy be fixed.

A few, errors happen when I place a destructable item that works but is not 100% in the right place. Those things I need to check out.

I don't have Modbuddy installed so I can't do that. I just periodically check my launch.log for errors, where there are ones which seem to relate to a mod I'll post about them. SOme have been false positives, some genuine.

Just thought with these most recent ones, the way I was reading the error message was that there's a car you can blow up (e.g. "ARC_VEH_ACV_DEST") in one of these PCPs (e.g. "SLM_Blvd_T_16x16_07_Doc_107") where it's defined location doesn't match with the tiles it occupies ("has a location (pivot) that does not match up with tile occupancy").

What the effect of these errors is (if any) I don't know, maybe just slower level generation / loading or some graphical discrepancies or some inaccurate cover indicators. Really don't know, nothing's leapt out at me playing the game and trying to work out when a particular log message is generated (initial game load, main menu screen, strategic or tactical layer) can be rather hard.

Yeah, I found some miss placed cover on that car dealership, took some screenshots myself and will fix that. As for those Covers placed a bit off... I will def. check them out. Possible on the weekend.

Might be from this, posting for checking. I dont have the save, i should have checked the PCP name not just the map name. Just check if you have any trucks missing frontal full cover.

https://postimg.org/image/a1zpnmt3d/

Thanks @ADVENT Avenger I found the faulty PCP and fixed it! It will be uploaded with my next patch of new PCP's. Thanks for your keen eye!

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1080752088

I'm getting no cover on this tire stack. Thanks for the mod and many prompt updates :).

Hey thanks @Charmed I'll see about fixing it tomorrow.

@Charmed I found and corrected those tires. Sadly there where more PCP's that had some faulty tire stacks in it. If you come across more, please let me know. Thanks.

Absolutely!