Problem with 7.30.UC5

Can somebody reproduce my problem? We have two onlines defined in a NCR MP-RAS SVR4 UNIX System with UNIX System V Release 4.0 Version 3.0 Engine: Informix Dynamic Server Version 7.30.UC5 INFORMIX-SQL Version 7.20.UD1 In sqlhosts we have: ncr4 onipcshm cc ncr4 ncr4_tcp ontlitcp cc istarha ncr5 onipcshm cc ncr5 ncr5_tcp ontlitcp cc istarch and we have defined the services. istarha 1528/tcp istarch 1532/tcp With two databases in both onlines: dbanameA and dbanameB which have this tables: IN dbanameA tableA In dbanameB tableB create tableA (keyA char(1)) create tableB (keyB char(1)) We are in the first online (INFORMIXSERVER=ncr4) when we type: $ isql dbanameAThe select is select * from tableA where keyA="0" and a.keyA not in (select b.keyB from dbnameB@ncr5_tcp:tableB b where b.keyB=a.keyB) The message we receive is: 25587 Network receive failed Thanks in advance