Network connection is broken

Hello, I’m having an error while attempting to execute a command dbschema on an instance of IDS - 9.40.FC2 on aix 5.2., it displays the following message: netuno:/desenv/hotel/htsp>dbschema -d system -t cmp_cmpotp DBSCHEMA Schema Utility INFORMIX-SQL Version 9.40.FC2 Copyright (C) Informix Software, Inc., 1984-1997 Software Serial Number AAA#B000000 -25582 - Network connection is broken. -404 - The cursor or statement is not available. -349 - Database not selected yet. However, in some cases the command is executed normally, without errors netuno:/desenv/hotel/htsp>onstat -d IBM Informix Dynamic Server Version 9.40.FC2 -- On-Line -- Up 00:24:44 --467184 Kbytes Dbspaces address number flags fchunk nchunks flags owner name 700000020183e58 1 0x40001 1 1 N B informix rootdbs 700000020328a00 2 0x40001 2 1 N B informix netuno_des_cdr 700000020328b80 3 0x48001 3 1 N SB informix netuno_des_sb 700000020328d00 4 0x42001 4 1 N TB informix dbtmp_des 4 active, 2047 maximum Chunks address chunk/dbs offset size free bpages flags pathname 700000020184028 1 1 0 524288 283242 PO-B /dev/rnetuno_des_1 700000020328538 2 2 0 131072 131019 PO-B /dev/rnetuno_des_cdr 7000000203286d0 3 3 0 65536 57373 57373 POSB /dev/rnetuno_des_sb Metadata 8110 5320 8110 700000020328868 4 4 0 65536 65483 PO-B /dev/rdbtmp_des_1 4 active, 32766 maximum Expanded chunk capacity mode: always Could someone help me understand what is going on ? Thanks, Odair Menegon