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[coldwind1978@yahoo.com.cn]

i want to perform response function caculation.  the program stop due to lack 
convergence.but i use the same parameters i have caculate DOS and 
ploarization.
i should how to do it?
the error is as follows:
scfcge : ERROR -
  Potential-based CG line minimization not converged after 13 restarts.
  Action : read the eventual warnings about lack of convergence.
  Some might be relevant. Otherwise, raise nband.
-P-0000
-P-0000  leave_new : decision taken to exit ....

Regards

                                                          zhuzhenye