When you set up the mount, the weights should be adjusted so that if you disengage the gears/worms (only do this if someone has a very firm hold on the counterweight arm) the telescope can be pushed to any position by finger.
Is that the case with this mount? If the telescope is strongly out of balance then the Home request may fail.
Also, am not quite clear from what you wrote. Does it complete the Home operation (with two tone noises) and come to a complete halt without producing the error message or does it only produce the error message when you try a subsequent slew?
I am with Martin on this one, the help support from the SB website is a good place to look to cure this problem – but its not rapid.