runcpf problem

[Amal Elramly]

Dear,
runcpf function does not work for 33 radial distribution system
Error Message below:
MATPOWER Version 5.0, 17-Dec-2014 -- AC Continuation Power FlowError using  - 
Matrix dimensions must agree.Error in runcpf (line 213)Sxfr = Sbust - Sbusb; 
could you help me 
Best Regards,
Amal Hassan