CCL: G09_opt 3D PBC_total charge is not ZERO

 Sent to CCL by: m.eslamibidgoli ..
 Dear CCL Subscribers,
 I wanted to optimize a polymer structure in a 3D PBC job with G09, containing
 138 atoms in the unit cell, using B97D/6-31G(d) level. But after about 10 hours
 my job was killed with this error: Total Charge is not ZERO/ There is a problem
 with the total charge; However, the value of the total charge is quite close to
 zero (ignorable). Would you please help me how I can solve this issue in G09? Is
 there any possible way to increase the limit value for the total charge?
 Thanks in advance,
 This electronic communication is governed by the terms and conditions at