Attempting to run the DBMSEXECUTE or DBMSCURSOR OPEN commands on a table stored in Informix 7.3 produces:
SQL error number -461 occurred while opening cursor
Cannot open file 'csql.iem'.
ArcInfo 8.0.x is attempting to find the file CSQL.IEM in the directory $INFORMIXDIR/msg/en_us/0333. CSQL.IEM and other necessary files are found in a newer version of the Informix client SDK.
Install the Informix client SDK Version 2.40.UC1 from Informix.