nshell problem

[am]

Does someone know what the following error message means and how it can be 
fixed?
IN CICON
nshell  11  11
nshell.ge.mxshell
ERROR EXIT

None of these variables are mentioned in the manual (I'm still using the 2000.1 
version)
Many thanks,
A. Metropoulos


____________________________________
Dr. Aristophanes Metropoulos
Institute for Theoretical and Physical Chemistry
National Hellenic Research Foundation
48 Vass. Constantinou Ave.
Athens 11635, Greece
Tel.: ++ (30210) 7273805
Fax:: ++ (30210) 7273794
e-mail: arimet at eie.gr