g98 Intrinsic reaction calculation

["Curtis Hoganson" <hoganson "-at-" dplus.net>]

Greetings,
   I have used gaussian98 to optimize to a putative transition state, to
 test the stationary point with a frequency calculation, and to perform
 an intrinsic reaction coordinate calculation to determine that the
 reactant and product are those desired. For these jobs, a single
 checkpoint file was used.
   I would now like to reoptimize the transition state using a larger
 basis set, so my questions are: does the checkpoint file after the irc
 calculation still contain the force constant information for the
 transition state geometry, and if so, what input command can I use to
 specify that the correct (cartesian) force constants should be read from
 the checkpoint file?
   [Clearly, I could have avoided this problem by copying and saving the
 checkpoint file from the frequency calculation, and in future will do
 so. ]
   Thanks for any help.
 Curtis Hoganson
 hoganson "-at-" dplus.net
 Dept of Chemistry, University of Delaware