formchk problem

Dear CCL-ers,
 We are trying to convert a check point file of a medium-size system
 (>150 atoms, basis functions ~2000)
 into a formatted form with formchk. The error message reads
 formchk e300.chk>
 Read checkpoint file e300.chk
  Write formatted file e300.fchk
  FChkPn allocation failure:  iend,mxcore=   3944196   2999478
  Error termination via Lnk1e.
 forrtl: severe (174): SIGSEGV, segmentation fault occurred
 cannot read in formchk
 as I understand it may be due to the default memory of formchk
 is not enough, since it really works well for small systems. Whatever
 causes it, could somebody have an idea to solve it? Thanks in advance.
 Chem. Engineering
 Univ. South Carolina