Problems with a ESQLC program

I work in an environment with 2 machines: one of them have (machine A) AIX 3.2 and Informix Online 5.02 the other have AIX 4.1 and Informix 7.1 (machine B). They are joined by a TCP/IP network trough Informix Star. I have an ESQL/C 5.0 program that read data from machine A and insert data into machine B. This program is running into the machine A. This program connects to machine B , reads data from B and A databases correctly, but when the program does a PREPARE of an INSERT sentence into machine B , the Informix 7.1 PANICS and it's necessary to execute oninit . This program works correctly in machines with Informix 5 . This problem ONLY appears when one machine have Informix 7.xx If I separate the PREPARE in a new programa it executes correctly. It seems that the proble may be related to big programas. In this program I use no synonyms , neither triggers , neither procedures. prepare sql error: -934 execute statment error: -410 online.log ------------ 14:30:31 Assert Failed: Internal Error - Segmentation Violation 14:30:31 Who:Session(5, informix@cardes, -1, 1074070688) Thread(29, sqlexec, 4002f514, 1) 14:30:31 Results: OnLine must abort 14:30:31 Action: Reinitialize shared memory 14:30:31 See Also: /tmp/af.1de3f6 14:30:31 rsinit.c, line 9232, thread 29, proc id 15550, Segmentation Violation. 14:30:31 PANIC: Attempting to bring system down 'Could anyone help me? Thank you in advance.