APBS solvation energy example
&cntrl
   maxcyc=0, imin=1,
   cut=12.0,
   igb=6, ntb=0,
   ntpr=1,
 /
&apbs
    apbs_print=1
    dime = 33, 33, 33
    cglen = 10.0, 10.0, 10.0
    fglen = 8.0, 8.0, 8.0
    nion=2,
    ionq  = 1.0, -1.0,
    ionc  = 0.15, 0.15,
    ionrr = 2.0, 2.0,
&end
