The version of the database server does not agree with the version of the database library routines in the application program. This incompatibility must be resolved before the program can be executed. The database server is selected through the SQLEXEC environment variable (for database server versions prior to 6.0). It contains a complete pathname to the database server code, which is usually named sqlexec or sqlturbo (for database server versions prior to 6.0). The access routines linked into the program were chosen when the program was compiled. If the program you are running was supplied by Informix or IBM, then it or another IBM Informix product might have been installed incorrectly.