B4R Question Can't compile because core not copied error??

[radiosky]

The first app I built using B4R worked perfectly. But now, no matter what source code, I get this:

B4R version: 1.00
Parsing code. (0.04s)
Compiling code. (0.19s)
Building project (0.90s)
Compiling & deploying Ino project (Arduino/Genuino Uno - COM1) Error
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-ar: unable to rename 'core\core.a'; reason: File exists
exit status 1
Error compiling for board Arduino/Genuino Uno.

Any ideas what is happening?

 

[Erel]

Try to clean the project (Ctrl + P) and compile again. Does it help?