[Contiki-developers] cannot open output file hello-world.elf: Permission denied

[Fei T. <ton...@gm...>]

Dear contiki developers,

Recently, I tried using cooja to build examples/hello-world.c file. The
first compilation is fine. But every time when I recompile it after
modifying the c file, it shows the following error:

*/usr/lib/gcc/avr/4.5.3/../../../avr/bin/ld: cannot open output file
hello-world.elf: Permission denied*

*collect2: ld returned 1 exit status*
*make: *** [hello-world.elf] Error 1*

Then I have to close cooja and relaunch it again. Would you please show me
a solution? You help would be greatly appreciated. Thanks in advance.

Best Regards,
Fei