Hallo
ich bekomme beim Compilern einen Fehler und meine AVR Studio 6.1 bleibt stehen.

Fehler Meldung.
Code:
------ Build started: Project: Terminal, Configuration: Debug AVR ------
Build started.
Project "Terminal.cproj" (default targets):
Target "PreBuildEvent" skipped, due to false condition; ('$(PreBuildEvent)'!='') was evaluated as (''!='').
Target "CoreBuild" in file "C:\Program Files (x86)\Atmel\Atmel Studio 6.1\Vs\Compiler.targets" from project "C:\Users\Ferdinand\Documents\Atmel Studio\6.1\Terminal\Terminal\Terminal.cproj" (target "Build" depends on it):
    Task "RunCompilerTask"
        C:\Program Files (x86)\Atmel\Atmel Studio 6.1\shellUtils\make.exe all 
        Building file: .././Terminal.c
        Invoking: AVR/GNU C Compiler : 3.4.2
        "C:\Program Files (x86)\Atmel\Atmel Toolchain\AVR8 GCC\Native\3.4.2.939\avr8-gnu-toolchain\bin\avr-gcc.exe"  -funsigned-char -funsigned-bitfields -DDEBUG  -O1 -ffunction-sections -fdata-sections -fpack-struct -fshort-enums -g2 -Wall -mmcu=atmega644p -c -std=gnu99 -MD -MP -MF "Terminal.d" -MT"Terminal.d" -MT"Terminal.o"   -o "Terminal.o" ".././Terminal.c"
C:\Users\Ferdinand\Documents\Atmel Studio\6.1\Terminal\Terminal\Terminal.c(27,2): #warning "F_CPU war noch nicht definiert, wird nun nachgeholt mit 8000000" [-Wcpp]
        Finished building: .././Terminal.c
        Building target: Terminal.elf
        Invoking: AVR/GNU Linker : 3.4.2
        "C:\Program Files (x86)\Atmel\Atmel Toolchain\AVR8 GCC\Native\3.4.2.939\avr8-gnu-toolchain\bin\avr-gcc.exe" -o Terminal.elf  Terminal.o   -Wl,-Map="Terminal.map" -Wl,--start-group -Wl,-lm  -Wl,--end-group -Wl,--gc-sections -mmcu=atmega644p 
        Finished building target: Terminal.elf
        "C:\Program Files (x86)\Atmel\Atmel Toolchain\AVR8 GCC\Native\3.4.2.939\avr8-gnu-toolchain\bin\avr-objcopy.exe" -O ihex -R .eeprom -R .fuse -R .lock -R .signature  "Terminal.elf" "Terminal.hex"
        "C:\Program Files (x86)\Atmel\Atmel Toolchain\AVR8 GCC\Native\3.4.2.939\avr8-gnu-toolchain\bin\avr-objcopy.exe" -j .eeprom  --set-section-flags=.eeprom=alloc,load --change-section-lma .eeprom=0  --no-change-warnings -O ihex "Terminal.elf" "Terminal.eep" || exit 0
        "C:\Program Files (x86)\Atmel\Atmel Toolchain\AVR8 GCC\Native\3.4.2.939\avr8-gnu-toolchain\bin\avr-objdump.exe" -h -S "Terminal.elf" > "Terminal.lss"
        make: *** Zugriff verweigert
        .  Stop.
        make: *** Waiting for unfinished jobs....
Wie kann ich das beheben.

Danke