CCL:G: CASSCF error in G03

From: "Vera Cathrine" <vera.cathrine-x-yahoo.com>
Subject: CCL:G: CASSCF error in G03
Date: Thu, 26 Jan 2012 12:05:54 -0500

 Sent to CCL by: "Vera  Cathrine" [vera.cathrine(0)yahoo.com]
 Dear CCL Users,
 I am running a casscf calculation in G03 and my route section is as following. I
 just read orbitals from a previous CAS(14,13) calculation and altered two
 orbitals. The reason is that I  want to reduce the cas space from 1413 (full
 active space ) to reduced one 1212.
 #p casscf(12,12)/3-21g  nosymm  geom=connectivity guess=(read,alter) pop=full
 But I got this kind of error in l401:
 (Enter /home/mdavari/g03/l401.exe)
  Initial guess read from the checkpoint file:
  input.chk
  Guess basis will be translated and rotated to current coordinates.
  Unexpected end-of-file while reading orbital switches.
  Error termination via Lnk1e in /home/vcathrine/g03/l401.exe at Thu Jan 26
 17:48:28 2012.
 Could anybody tell me why this kind of generic error occurs?
 Thank you in advance,
 Regrads,
 Vera