MOUSE returns Invalid Input

[Han]

Did you check to see if MOUSE() returned an empty list? The very first instance of MOUSE() may very well return an empty list, in which case L0(1,1) and L0(1,2) would cause errors.

Code:


L0:=MOUSE();

// check if we have valid mouse input
IF (SIZE(L0(1)) OR SIZE(L0(2))) THEN

  // handles first mouse
  IF SIZE(L0(1)) THEN
    // code here for mouse 1
  END;

  // handles second mouse
  IF SIZE(L0(2)) THEN
    // code here for mouse 2
  END;

END;