Couldnt determine program size

Hi,

I'm suddenly getting the following message everytime I compile a sketch:

Couldnt determine program size: {0}

Never had this problem before. It happens with all sketches but it apparently doesn't prevent the sketch from being compiled and uploaded.

Could it be related to the the fact that the Windows temp folder was purged?

Thanks in advance

What version of the IDE? What version of Windows? What board type?