---- Minecraft Crash Report ----
// I feel sad now :(

Time: 02.02.15 15:36
Description: Updating screen events

java.lang.RuntimeException: Failed to check session lock, aborting
	at bqk.h(SourceFile:49)
	at bqk.<init>(SourceFile:35)
	at bqg.<init>(SourceFile:19)
	at bqh.a(SourceFile:78)
	at bss.a(SourceFile:1882)
	at bxf.i(SourceFile:172)
	at bxf.a(SourceFile:135)
	at bxe.a(SourceFile:342)
	at bxe.k(SourceFile:405)
	at bxf.k(SourceFile:81)
	at bxe.p(SourceFile:382)
	at bss.r(SourceFile:1480)
	at bss.at(SourceFile:880)
	at bss.a(SourceFile:317)
	at net.minecraft.client.main.Main.main(SourceFile:124)


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

-- Head --
Stacktrace:
	at bqk.h(SourceFile:49)
	at bqk.<init>(SourceFile:35)
	at bqg.<init>(SourceFile:19)
	at bqh.a(SourceFile:78)
	at bss.a(SourceFile:1882)
	at bxf.i(SourceFile:172)
	at bxf.a(SourceFile:135)
	at bxe.a(SourceFile:342)
	at bxe.k(SourceFile:405)
	at bxf.k(SourceFile:81)
	at bxe.p(SourceFile:382)

-- Affected screen --
Details:
	Screen name: bxp
Stacktrace:
	at bss.r(SourceFile:1480)
	at bss.at(SourceFile:880)
	at bss.a(SourceFile:317)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.8.1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 203667432 bytes (194 MB) / 269676544 bytes (257 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.8.1
	LWJGL: 2.9.1
	OpenGL: AMD Radeon HD 7450 GL version 4.1.11247 Compatibility Profile Context, ATI Technologies Inc.
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Deutsch (Deutschland)
	Profiler Position: N/A (disabled)