strange messages in online.log

Hello All. Problem. OS: AIX Version 4.2 IFMX: INFORMIX-OnLine Dynamic Server 7.23.UC1 There is online.log fragment: 14:34:13 Assert Failed: WARNING! Can't load locale for 'lv_lv.1257',partnum 0x300264 14:34:13 Who: Session(679, informix@leonid.s13.dati.lv, 295,1074132708) Thread(1854, sqlexec, 4003ca94, 1) 14:34:13 Results: Cannot open table 'muitatests:informix.systables' 14:34:13 Action: See GLS error -23101 14:34:13 See Also: /tmp/af.73ebdc4 14:34:16 Assert Failed: WARNING! Can't load locale for 'lv_lv.1257',partnum 0x30038c 14:34:16 Who: Session(679, informix@leonid.s13.dati.lv, 295,1074132708) Thread(1854, sqlexec, 4003ca94, 1) 14:34:16 Results: Cannot open table 'muitatests:informix.systables' 14:34:16 Action: See GLS error -23101 14:34:16 See Also: /tmp/af.73ebdc4 14:34:20 Assert Failed: WARNING! Can't load locale for 'lv_lv.1257',partnum 0x300560 14:34:20 Who: Session(679, informix@leonid.s13.dati.lv, 295,1074132708) Thread(1854, sqlexec, 4003ca94, 1) 14:34:20 Results: Cannot open table 'muitatests:informix.systables' 14:34:20 Action: See GLS error -23101 14:34:20 See Also: /tmp/af.73ebdc4 14:34:21 Assert Failed: WARNING! Can't load locale for 'lv_lv.1257',partnum 0x300561 14:34:21 Who: Session(679, informix@leonid.s13.dati.lv, 295,1074132708) Thread(1854, sqlexec, 4003ca94, 1) 14:34:21 Results: Cannot open table 'muitatests:informix.systables' 14:34:21 Action: See GLS error -23101 14:34:21 See Also: /tmp/af.73ebdc4 There is not records with mentioned partnums in sysmaster:systabnames. Table 'muitatests:informix.systables' has partnum=0x300620. 1. What this means? 2. What must i do to stop this messages and af.* files generation? Leonid.