Blink won't compile

Using Arduino Programming Questions
1

I tried to compile blink after having some issues with some other code but I get this error message when I try to verify the code:

Arduino: 1.6.11 (Windows 10), Board: "Arduino/Genuino Uno"

c:\program files (x86)\arduino\hardware\tools\avr\bin../lib/gcc/avr/4.9.2/../../../../avr/bin/ar.exe: unable to rename 'core\core.a'; reason: Permission denied

exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Can anyone shed any light on what the problem could be?

2

Can anyone shed any light on what the problem could be?

Are the messages not obvious enough? Try manually deleting the core\core.a file. Enable verbose mode when compiling to see where the file is really created.

3

There seems to be more than that file though. This is what comes up when I enable verbose mode:

Arduino: 1.6.11 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Oliver Whinnett\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10611 -build-path C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp -warnings=none -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\Oliver Whinnett\Documents\Arduino\libraries -fqbn=arduino:avr:uno -vid-pid=0X2341_0X0043 -ide-version=10611 -build-path C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp -warnings=none -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Program Files (x86)\Arduino\examples\01.Basics\Blink\Blink.ino
Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp\sketch\Blink.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp\sketch\Blink.ino.cpp" -o "nul"
Generating function prototypes...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10611 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp\sketch\Blink.ino.cpp" -o "C:\Users\OLIVER~1\AppData\Local\Temp\build9c9ef3bdfe2fccb480bc6e4bac749e41.tmp\preproc\ctags_target_for_gcc_minus_e.cpp"
exec: "C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++": file does not exist
Error compiling for board Arduino/Genuino Uno.

4

Bearlover:
There seems to be more than that file though. This is what comes up when I enable verbose mode:

exec: "C:\\Program Files (x86)\\Arduino\\hardware\\tools\\avr/bin/avr-g++": file does not exist

Seens that you should download the Arduino IDE again, probably you are missing some files..

5

A bunch of people have had IDE 1.6.x problems, including IDE crashes and bizarre compile errors, when they had a previous 1.5.x/1.6.x installation. At least some of those problems seem to be caused by out-of-date executables and scripting files that the IDE saves outside the IDE installation directory. Perhaps that is what is causing your particular problem. In such cases it appears that the fix is to delete or rename the old "Arduino15" directory and re-install 1.6.x.

On Mac OS X:
/Users/(username)/Library/Arduino15
(Note: The 'Library' folder is greyed out in Finder. The contents are not included in a Spotlight or Finder search. The folder can't be opened with a double-click. To browse the contents of 'Library', ctrl-click on it and select "Open in New Tab" from the pop-up menu.)

On Windows delete or rename both:
Arduino IDE 1.6.5r5 and previous: C:\Users(username)\AppData\Roaming\Arduino15
Arduino IDE 1.6.6 and later: C:\Users(username)\AppData\Local\Arduino15

On Linux:
/home/(username)/.arduino15 (a.k.a. ~/.arduino15)
(Note: file/folder names starting with '.' are not normally shown in directory listings. Use 'ls -a' to get a directory listing that includes the hidden files.)