Hi
I know this has been open for a while, but hopefully this will help someone else.
I had the same issue and got it resolved as follows:
deploy GPCORE06_0-20007079.SCA with the telnet command:
telnet localhost 5<system no>08
>> deploy /path_to_file/GPCORE06_0-20007079.SCA
It will start and then after a short while kick you out.
It is normal. It will also restart the AS Java.
Once completed, retry your SUM Process.
Hope this helps
Thanks
H