Ho there,
I have seen that the following mistake appeared already several times, but i could not find any method solving this problem for my case, i hope somebody has an idea anyway.
Iam using Windows 7 and Arduino 1.0.5-r2 for an arduino UNO board.
In around 19 of 20 times when i try to compile or upload any sketch i recieve the following error (see fat message below):
C:\arduino-1.0.5-r2-windows\arduino-1.0.5-r2\hardware\tools\avr\bin\avr-ar rcs C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\core.a C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\IPAddress.cpp.o
C:\arduino-1.0.5-r2-windows\arduino-1.0.5-r2\hardware\tools\avr\bin\avr-ar rcs C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\core.a C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\main.cpp.o
C:\arduino-1.0.5-r2-windows\arduino-1.0.5-r2\hardware\tools\avr\bin\avr-ar rcs C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\core.a C:\Users\Tom\AppData\Local\Temp\build5419200730988205964.tmp\new.cpp.o
C:\arduino-1.0.5-r2-windows\arduino-1.0.5-r2\hardware\tools\avr\bin\avr-ar: unable to rename 'core.a'; reason: File exists
I tried now since one day several things, in deatail: installed several versions, checked permission rights, installed in different directories, deleted temp folders before using, ..... nothing worked.
Do you have any ideas? (I want to emphasize that it works extremely seldom, all in all 2 times during 1 day of trying, yes thats really deeply frustrating =( )