In one of my apps I used the statement MyPhone.KeepAlive(true) so far - to keep it alive but allow for screen dimming. Now on B4A 1.2 I always get some runtime error message: "Illegal Argument Exeception on Line ..." However - if I change the boolean argument to False, no error message is shown. On B4A 1.1 I didn't see that behaving. My Phone Lib is V1.31