CCL:G: a question about solvent computation



the head file is :
#p hf/6-311++g** scf=tight scrf(pcm,read,solvent=water)
 
the error termination is :
Annihilation of the first spin contaminant:
 S**2 before annihilation     0.8506,   after     0.7572
 Convergence failure -- run terminated.
 Error termination via Lnk1e in /home/user/ustcguo/g03/l502.exe at Wed Jul 23 22:02:34 2008.
 Job cpu time:  0 days  0 hours 31 minutes 45.5 seconds.
 File lengths (MBytes):  RWF=     82 Int=      0 D2E=      0 Chk=      2 Scr=      1
 
DeltaG (solv)                            (kcal/mol) =     -64.82
the result comes out, but I wonder whether it is correct. because I 've calculated a file which gave two different DeltaGs on two mechines.
 
thanks for the help!