Error compiling

[frekkia]

hi, I have this problem with the compilation, and for days I try to understand what it is but without success.

/home/brixia/Scrivania/McLighting-3.1.4/Arduino/McLighting/McLighting.ino: In function 'void loop()':
McLighting:712: error: 'handleE131Play' was not declared in this scope
if (playE131 == true) { handleE131Play(); }
^
exit status 1
'handleE131Play' was not declared in this scope