FTB Ultimate crashes on boot, clean install

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Ninety-Three

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Jul 29, 2019
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I have uninstalled Java, FTB and Minecraft, then reinstalled them, and I'm on Java 7.51, Windows 7. When I boot FTB Ultimate, it hangs for a bit on the Mojang loading screen, then gives me this error: pastebin. What do I do?
 

lavarthan

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Jul 29, 2019
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java.lang.NullPointerException
at wn.a(CraftingManager.java:200)
at cpw.mods.fml.common.registry.GameRegistry.addShapedRecipe(GameRegistry.java:259)
at cpw.mods.fml.common.registry.GameRegistry.addRecipe(GameRegistry.java:254)
at codechicken.wirelessredstone.addons.WRAddonProxy.addRecipes(WRAddonProxy.java:50)
It appears that it is unable to add one of the recipes from Wireless Redstone(?). Could you post a console log to pastebin as well? Press the 'Paste my log to pastebin.com' button. This will add a link to the bottom of the console for the pastebin link. I know that you called it a clean install, but did you add any mods or change any mod versions?
 

Ninety-Three

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Jul 29, 2019
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I haven't touched a thing. Uninstalled everything, reinstalled Java, reinstalled FTB, clicked Ultimate, launched it, got this error. Launched it again to get a console log here, and the crashlog for that instance here.
Edit: Clarified.
 
Last edited:

lavarthan

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Jul 29, 2019
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(The requested operation cannot be performed on a file with a user-mapped section open)
I was hoping that another clue to the cause would present itself in a console log that might not appear in a crash log. This error is caused by minecraft not being able to access the listed file. Try adding the folder 'C:\Users\Stephen\Documents\MinecraftFTB\' to the exception list of your antivirus program. Check any boxes that say 'include sub-folders' as you do.
 

Ninety-Three

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Jul 29, 2019
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Looks like that was what was doing it, thanks. Now I need to go find an antivirus program that doesn't make me tear my hair out.
 

lavarthan

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Jul 29, 2019
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I've recently taken a liking to Avast! So far I've had little frustration from it. I did have to once add the FTB folder to the exclusion, or exceptions, list after I updated it, but I was able to remove it after FTB booted once so I'm not 100% sure if that was causing the slow down or not. The more recent updates have not caused that amount of slow down. I hope you do find one that works for you.