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Building lights doesn't work after restarting the editor

Since the migration of our project from 4.11 to 4.12, we have a problem with lights building. When we build the lights everything works as expected. We can then PIE and all the lights are builded. But as soon as we close and restart the editor, the previous building is not saved and the message "lighting need to be rebuilt" reappears.

We tried a lot of things but nothing seems to fix this. Is it a 4.12 bug or are we missing a step?

Product Version: UE 4.12
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asked Jun 06 '16 at 03:56 PM in Bug Reports

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VRMD
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avatar image AndrewHurley Jun 06 '16 at 06:04 PM

Hey VRMD,

Can you reproduce this in a blank project, or is this specific to your project?

If you can provide me with some steps or a way to get this issue to occur on my end, we can get a bug entered and a fix made.

Thank you,

Andrew Hurley

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Hey AndrewHurley,

We finally found the cause of the problem: it was some BSP that we migrated with the project. After removing and adding them again the lighting build stay in place after an editor restart.

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answered Jun 07 '16 at 09:18 AM

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VRMD
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