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Game Crashes From GUI


Frost Dragon Empire

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I am trying to send a message to the server to teleport the player. But when I add this code to the GUI it crashes.

 

BookMessageToServer bookMessageToServer = new BookMessageToServer();

CommonProxy.simpleNetworkWrapper.sendToServer(bookMessageToServer);

 

It looks like it's crashing inside the GUI. Is the client getting mixed up in server code? I am not sure what is going on here.

 

---- Minecraft Crash Report ----
// You're mean.

Time: 12/6/17 10:56 PM
Description: Updating screen events

java.lang.NullPointerException: Updating screen events
	at com.frostdragon7.mystrecrafted.client.gui.BookGUI.actionPerformed(BookGUI.java:212)
	at net.minecraft.client.gui.GuiScreen.mouseClicked(GuiScreen.java:494)
	at com.frostdragon7.mystrecrafted.client.gui.BookGUI.mouseClicked(BookGUI.java:244)
	at net.minecraft.client.gui.GuiScreen.handleMouseInput(GuiScreen.java:611)
	at net.minecraft.client.gui.GuiScreen.handleInput(GuiScreen.java:576)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1884)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1186)
	at net.minecraft.client.Minecraft.run(Minecraft.java:441)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:26)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
	at com.frostdragon7.mystrecrafted.client.gui.BookGUI.actionPerformed(BookGUI.java:212)
	at net.minecraft.client.gui.GuiScreen.mouseClicked(GuiScreen.java:494)
	at com.frostdragon7.mystrecrafted.client.gui.BookGUI.mouseClicked(BookGUI.java:244)
	at net.minecraft.client.gui.GuiScreen.handleMouseInput(GuiScreen.java:611)
	at net.minecraft.client.gui.GuiScreen.handleInput(GuiScreen.java:576)

-- Affected screen --
Details:
	Screen name: ~~ERROR~~ NullPointerException: null

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [EntityPlayerSP['Player754'/281, l='MpServer', x=-16.59, y=72.00, z=228.01]]
	Chunk stats: MultiplayerChunkCache: 601, 601
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-64,64,256), Chunk: (at 0,4,0 in -4,16; contains blocks -64,0,256 to -49,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 84618 game time, 10407 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 103 total; [EntityPlayerSP['Player754'/281, l='MpServer', x=-16.59, y=72.00, z=228.01], EntityRabbit['Rabbit'/73, l='MpServer', x=-90.72, y=68.00, z=200.90], EntityRabbit['Rabbit'/74, l='MpServer', x=-87.53, y=67.00, z=194.33], EntityCreeper['Creeper'/75, l='MpServer', x=-80.50, y=28.00, z=255.50], EntityCow['Cow'/76, l='MpServer', x=-93.48, y=68.00, z=270.73], EntityCreeper['Creeper'/80, l='MpServer', x=-65.22, y=15.00, z=183.58], EntityCow['Cow'/81, l='MpServer', x=-68.80, y=71.00, z=245.52], EntitySkeleton['Skeleton'/82, l='MpServer', x=-75.50, y=27.00, z=268.50], EntityCow['Cow'/83, l='MpServer', x=-58.85, y=71.00, z=250.66], EntityCow['Cow'/84, l='MpServer', x=-62.78, y=68.00, z=277.50], EntitySheep['Sheep'/85, l='MpServer', x=-76.73, y=69.00, z=278.49], EntityCow['Cow'/86, l='MpServer', x=-77.17, y=69.00, z=294.19], EntityRabbit['Rabbit'/90, l='MpServer', x=-53.53, y=68.00, z=155.69], EntityZombie['Zombie'/91, l='MpServer', x=-52.23, y=42.00, z=181.41], EntityCreeper['Creeper'/92, l='MpServer', x=-50.48, y=27.00, z=206.22], EntityCreeper['Creeper'/93, l='MpServer', x=-53.30, y=16.00, z=198.49], EntityCow['Cow'/94, l='MpServer', x=-51.47, y=66.00, z=267.81], EntityZombie['Zombie'/95, l='MpServer', x=-62.20, y=24.00, z=291.49], EntityBat['Bat'/106, l='MpServer', x=-52.31, y=26.99, z=182.34], EntityBat['Bat'/107, l='MpServer', x=-32.45, y=17.06, z=161.28], EntityCreeper['Creeper'/108, l='MpServer', x=-50.16, y=18.00, z=198.50], EntityCow['Cow'/109, l='MpServer', x=-35.22, y=69.00, z=199.49], EntityPig['Pig'/110, l='MpServer', x=-34.64, y=71.00, z=222.29], EntitySkeleton['Skeleton'/111, l='MpServer', x=-39.04, y=13.00, z=252.63], EntityBat['Bat'/112, l='MpServer', x=-34.25, y=15.10, z=250.39], EntitySkeleton['Skeleton'/113, l='MpServer', x=-46.27, y=26.00, z=241.50], EntitySkeleton['Skeleton'/114, l='MpServer', x=-36.66, y=19.00, z=254.11], EntityPig['Pig'/115, l='MpServer', x=-33.51, y=68.00, z=244.67], EntityZombie['Zombie'/116, l='MpServer', x=-36.97, y=13.00, z=258.05], EntityZombie['Zombie'/117, l='MpServer', x=-36.55, y=13.00, z=256.60], EntityBat['Bat'/118, l='MpServer', x=-35.25, y=16.10, z=256.72], EntityBat['Bat'/119, l='MpServer', x=-35.25, y=16.10, z=256.36], EntitySkeleton['Skeleton'/120, l='MpServer', x=-32.50, y=19.00, z=263.24], EntityCow['Cow'/121, l='MpServer', x=-35.58, y=68.00, z=281.79], EntityCow['Cow'/122, l='MpServer', x=-24.53, y=66.00, z=274.85], EntityRabbit['Rabbit'/127, l='MpServer', x=-30.33, y=64.00, z=184.49], EntityPig['Pig'/128, l='MpServer', x=-21.40, y=71.00, z=212.24], EntityZombie['Zombie'/129, l='MpServer', x=-17.31, y=24.00, z=208.93], EntityCreeper['Creeper'/130, l='MpServer', x=-29.50, y=18.00, z=225.17], EntitySkeleton['Skeleton'/131, l='MpServer', x=-18.50, y=27.00, z=229.27], EntitySpider['Spider'/132, l='MpServer', x=-28.30, y=19.00, z=226.98], EntitySkeleton['Skeleton'/133, l='MpServer', x=-25.50, y=19.00, z=225.50], EntitySkeleton['Skeleton'/134, l='MpServer', x=-29.50, y=19.00, z=226.27], EntityCow['Cow'/135, l='MpServer', x=-18.55, y=71.00, z=236.43], EntitySkeleton['Skeleton'/136, l='MpServer', x=-28.50, y=26.00, z=241.74], EntitySkeleton['Skeleton'/137, l='MpServer', x=-31.55, y=27.00, z=242.73], EntityCow['Cow'/138, l='MpServer', x=-24.50, y=68.00, z=263.80], EntityCow['Cow'/139, l='MpServer', x=-26.45, y=69.00, z=259.08], EntityCow['Cow'/140, l='MpServer', x=-21.15, y=65.00, z=291.51], EntityRabbit['Rabbit'/143, l='MpServer', x=-5.14, y=65.00, z=171.64], EntitySkeleton['Skeleton'/144, l='MpServer', x=-13.30, y=36.00, z=195.49], EntityCow['Cow'/145, l='MpServer', x=1.23, y=72.00, z=204.46], EntityRabbit['Rabbit'/146, l='MpServer', x=1.54, y=71.00, z=227.50], EntityZombie['Zombie'/147, l='MpServer', x=-4.26, y=29.00, z=271.53], EntityCreeper['Creeper'/148, l='MpServer', x=-8.50, y=33.00, z=266.50], EntityZombie['Zombie'/149, l='MpServer', x=-1.46, y=33.00, z=271.75], EntityCow['Cow'/150, l='MpServer', x=-20.19, y=66.00, z=263.47], EntityCow['Cow'/151, l='MpServer', x=-10.54, y=64.00, z=262.17], EntitySheep['Sheep'/153, l='MpServer', x=-6.28, y=64.00, z=305.45], EntityCreeper['Creeper'/156, l='MpServer', x=2.83, y=47.00, z=159.50], EntityCreeper['Creeper'/157, l='MpServer', x=12.46, y=25.00, z=164.83], EntityCreeper['Creeper'/158, l='MpServer', x=8.50, y=32.00, z=172.50], EntityCreeper['Creeper'/159, l='MpServer', x=14.19, y=32.00, z=165.50], EntityCreeper['Creeper'/160, l='MpServer', x=9.50, y=32.00, z=175.50], EntityCreeper['Creeper'/161, l='MpServer', x=15.48, y=23.00, z=184.20], EntitySkeleton['Skeleton'/162, l='MpServer', x=15.50, y=47.00, z=191.33], EntityCreeper['Creeper'/163, l='MpServer', x=10.51, y=47.00, z=188.77], EntityZombie['Zombie'/164, l='MpServer', x=10.45, y=47.00, z=187.22], EntityZombieVillager['Zombie Villager'/165, l='MpServer', x=8.78, y=32.00, z=182.17], EntitySkeleton['Skeleton'/166, l='MpServer', x=9.50, y=32.00, z=191.29], EntitySkeleton['Skeleton'/167, l='MpServer', x=9.50, y=32.00, z=184.50], EntityZombie['Zombie'/168, l='MpServer', x=9.65, y=19.00, z=200.22], EntityZombie['Zombie'/169, l='MpServer', x=4.83, y=20.00, z=197.70], EntityCreeper['Creeper'/170, l='MpServer', x=4.52, y=20.00, z=194.83], EntityCow['Cow'/171, l='MpServer', x=2.17, y=68.00, z=197.43], EntityPig['Pig'/172, l='MpServer', x=10.50, y=71.00, z=208.75], EntityPig['Pig'/173, l='MpServer', x=5.65, y=64.00, z=240.26], EntitySkeleton['Skeleton'/174, l='MpServer', x=4.47, y=30.00, z=280.27], EntityZombie['Zombie'/175, l='MpServer', x=2.50, y=33.00, z=275.50], EntityRabbit['Rabbit'/176, l='MpServer', x=7.15, y=66.00, z=281.22], EntityCow['Cow'/177, l='MpServer', x=12.78, y=64.00, z=290.43], EntityCreeper['Creeper'/189, l='MpServer', x=16.16, y=32.00, z=180.41], EntitySkeleton['Skeleton'/190, l='MpServer', x=16.50, y=23.00, z=196.50], EntityBat['Bat'/191, l='MpServer', x=21.25, y=39.10, z=205.75], EntityCreeper['Creeper'/192, l='MpServer', x=33.42, y=55.00, z=211.78], EntitySkeleton['Skeleton'/193, l='MpServer', x=29.50, y=52.00, z=215.71], EntityRabbit['Rabbit'/194, l='MpServer', x=17.14, y=70.00, z=210.08], EntityCreeper['Creeper'/195, l='MpServer', x=27.85, y=44.00, z=232.40], EntitySkeleton['Skeleton'/196, l='MpServer', x=22.49, y=46.00, z=250.72], EntityPig['Pig'/197, l='MpServer', x=26.22, y=68.00, z=261.50], EntityPig['Pig'/198, l='MpServer', x=25.42, y=67.00, z=270.22], EntityRabbit['Rabbit'/212, l='MpServer', x=40.47, y=70.00, z=149.89], EntityRabbit['Rabbit'/213, l='MpServer', x=40.54, y=67.00, z=164.82], EntityRabbit['Rabbit'/214, l='MpServer', x=38.93, y=70.00, z=221.10], EntityRabbit['Rabbit'/215, l='MpServer', x=36.77, y=67.00, z=243.50], EntityRabbit['Rabbit'/216, l='MpServer', x=42.18, y=66.00, z=287.13], EntitySheep['Sheep'/217, l='MpServer', x=34.35, y=67.00, z=299.23], EntityRabbit['Rabbit'/227, l='MpServer', x=56.48, y=71.00, z=192.50], EntityRabbit['Rabbit'/229, l='MpServer', x=55.70, y=72.00, z=208.53], EntityRabbit['Rabbit'/230, l='MpServer', x=53.99, y=71.00, z=222.96], EntityRabbit['Rabbit'/231, l='MpServer', x=55.65, y=72.00, z=215.06], EntityRabbit['Rabbit'/232, l='MpServer', x=60.48, y=71.00, z=215.34], EntityPig['Pig'/233, l='MpServer', x=44.67, y=65.00, z=296.48]]
	Retry entities: 0 total; []
	Server brand: fml,forge
	Server type: Integrated singleplayer server
Stacktrace:
	at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:461)
	at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2897)
	at net.minecraft.client.Minecraft.run(Minecraft.java:462)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:26)

-- System Details --
Details:
	Minecraft Version: 1.12.2
	Operating System: Mac OS X (x86_64) version 10.13.1
	Java Version: 1.8.0_151, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 644363672 bytes (614 MB) / 1056309248 bytes (1007 MB) up to 1056309248 bytes (1007 MB)
	JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	FML: MCP 9.42 Powered by Forge 14.23.1.2559 5 mods loaded, 5 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

	| State     | ID            | Version      | Source                           | Signature |
	|:--------- |:------------- |:------------ |:-------------------------------- |:--------- |
	| UCHIJAAAA | minecraft     | 1.12.2       | minecraft.jar                    | None      |
	| UCHIJAAAA | mcp           | 9.42         | minecraft.jar                    | None      |
	| UCHIJAAAA | FML           | 8.0.99.99    | forgeSrc-1.12.2-14.23.1.2559.jar | None      |
	| UCHIJAAAA | forge         | 14.23.1.2559 | forgeSrc-1.12.2-14.23.1.2559.jar | None      |
	| UCHIJAAAA | mystrecrafted | 0.0.1        | bin                              | None      |

 

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Yeah it looks like you're attempting to use gui/client stuff on the server.

You should post your code to a github repo and link it here for people to take a look. Posting snippets or individual classes usually doesn't provide enough information to pinpoint the issue.

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