About the branch violation

[chixinx...@hotmail.com]

Dear all,
   I am programming by the use of 'runpf' and to be required not to ignore any 
limits such as the generator, the branch flow and the voltage.
   Although I have set the 'pf.enforce_q_lims' into 1 or 2, the 'pf.tol' into 
10e-20 and the 'pf.nr.max_it' into 40, the branch flow still has violation at 
branch 10.
    Can anybody give me some suggestion when you are at convenience? Thanks a 
lot.
Regards,
Chixin