QB64-PE/internal/source/ret192.txt

if (next_return_point){
next_return_point--;
switch(return_point[next_return_point]){
case 0:
error(3);
break;
case 166:
goto RETURN_166;
break;
case 167:
goto RETURN_167;
break;
case 168:
goto RETURN_168;
break;
}
}
error(3);