That type of error usually means you don't have an object where you think. In this case it says $mcr_crtime_chart is not a valid object that you can call SetSourceData on. I've found this is usually happens when creating the object fails. So the real problem is with:
$mcr_crtime_chart = $Excel->Charts-Add;

Change it to:
$mcr_crtime_chart = $Book->Charts-Add;