CCL:G: Error while optimizing protien in Gaussian09 using Amber force field



 Sent to CCL by: "Rinsha  CH" [rinsha_p170030cy]^[nitc.ac.in]
 Hello,
 I was optimizing  the structure of a protein in gaussian09 using amber
 force field (ff12sb) and I encountered with an error,
 1)Read MM parameter file:
  ff12SB IFunc=          -1
  Function name not recognized in RdPar
  Error termination via Lnk1e in /nfs-scratch/Apps/gaussian09/g09/l101.exe
 2) Read MM parameter file:
  Wrong or no center in RdPar.
  Error termination via Lnk1e in /nfs-scratch/Apps/gaussian09/g09/l101.exe
 How can I solve these error?
 Thanks in advance.