Can't export my file in flac

Hello there,
I just finished some audio editing and wanted to export it as usual. Unfortunately after some time, it stops and tells me to look at the messages in “the journal” (in french). export does not work for flac file or for wav file but worked when I tried to export as a mp3 file with “quick export”.
Any idea where is “the journal” ?
Thx

i found the journal. It seems to be a lack of available space on my partition… ! I deal with that, and tell you if everything is fine.