CCL: ccsd (t): Excessive mixing of frozen core and valence orbitals

From: "Valentin Vassilev-Galindo" <vvassilevgalindo(~)gmail.com>
Subject: CCL: ccsd (t): Excessive mixing of frozen core and valence orbitals
Date: Mon, 7 Nov 2016 15:36:29 -0500

 Sent to CCL by: "Valentin  Vassilev-Galindo"
 [vvassilevgalindo(a)gmail.com]
 I did a coupled cluster calculation and I found the error shown below.
 Could you give me some suggestion? Thank you!
 Input file:
 % MEM=28GB
 # ccsd(t) Def2TZVP SCF=(MAXCYCLES=3000)
 ### COMMENT ###
 0           1
 F     2.026723000     -1.795391000     -0.062792000
 Zr    1.082243000     -0.123016000     -0.206225000
 F     1.282418000      1.817002000      0.513824000
 C    -0.701823000     -0.128018000      0.765581000
 Al   -0.596452000      1.853945000      1.068611000
 Al   -1.552563000      1.331878000     -1.320150000
 Al   -1.383337000     -1.123291000     -1.197280000
 Al   -1.764653000     -1.639899000      1.417760000
 Last lines of output file:
 Defaulting to unpruned grid for atomic number  40.
  Defaulting to unpruned grid for atomic number  40.
  Defaulting to unpruned grid for atomic number  40.
  Defaulting to unpruned grid for atomic number  40.
  Largest valence mixing into a core orbital is  4.51D-01
  Largest core mixing into a valence orbital is  4.84D-01
  Excessive mixing of frozen core and valence orbitals.
  Error termination via Lnk1e in /storage/software/intel/g09/l801.exe at Mon Nov
 7 11:44:53 2016.
  Job cpu time:       0 days  0 hours  2 minutes 27.9 seconds.
  File lengths (MBytes):  RWF=     31 Int=      0 D2E=      0 Chk=      2 Scr=
 1
 With best regards,
 Valentin Vassilev-Galindo