When connecting to the Informix database in the Database Configuration dialog, there is an error message similar to the following:
A common mistake is to specify a SQLI port number in the Database Configuration dialog. The IBM Data Server .NET Provider uses the DRDA protocol (not the SQLI protocol) to communicate with Informix, therefore, a DRDA port number must be specified in the Database Configuration dialog.
By default Informix is installed with DRDA support and the port number is 9089. However, if Informix is installed without the DRDA support, you will need to enable the DRDA support by following instructions in the IBM Informix Developer's Handbook > the "Enabling DRDA support" section.
