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Moving a map file with a landscape material causes issues

Seems to be an issue with the landscape material. Trying to move the file causes this error

Can't save D:/Repos/MapError/BattleTank/Content/_Levels/Battleground.umap: Graph is linked to private object(s) in an external package.
External Object(s):
LandscapeMaterialInstanceConstant_6
LandscapeMaterialInstanceConstant_8
LandscapeMaterialInstanceConstant_4
LandscapeMaterialInstanceConstant_10
Try to find the chain of references to that object (may take some time)?

Selecting yes fails to work and then continuing/cancelling causes the map to be corrupted and trying to load the moved file causes the editor to crash.
A workaround is to move the file and then remove and readd the material (Or the other way around) in the landscape's details before saving.

Repo for reproducing this https://github.com/SuperWig/04_BattleTank

Edit: Appears to be UE-62150

Product Version: UE 4.20
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asked Aug 21 '18 at 11:54 AM in Bug Reports

avatar image

Superwig
26 3 8

avatar image Jeff A ♦♦ STAFF Aug 21 '18 at 08:24 PM

Hello,

We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks

avatar image Superwig Aug 22 '18 at 08:55 AM

Oh I see it's already there (UE-62150), though my post has additional information.

avatar image SalahAdDin Feb 05 '19 at 08:19 AM

I reviewed it and it is working right now.

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