Thanks Kevin. I tried it yesterday (copy / paste solution), but it… failed. After this I’ve closed the Processing IDE, I’ve opened the *.js file with an editor (Atom, apparently the one used by Daniel Shifman into his famous videos). Everything worked fine at execution into browser and Atom editor didn’t point a syntax error. But if I reopen the corrected sketch back into Processing IDE I get exactly the same error. So it’s still a mystery. Bug into Processing IDE code parser? Should I put this thread into github Processing developpers forum?