Question

I updated Xcode to the 4.3.1 version but now I don’t know what’s going on. When I compile my project, the compiler gives this error:

Lexical issue : ‘Availability.h’ file not found

And in other old projects :

Lexical issue’QuartzCore/QuartzCore.h’ file not found

It’s so strange! But how can I fix these errors?

I already removed frameworks and added them again, but nothing changed.

Answer 1

I have faced this error ! I uninstall xcode then re install xcode 4.2 then update to 4.3 and worked !

try remove your current xcode with this code :

sudo /Developer/Library/uninstall-devtools --mode=all

hope this works …