Release notes (Windows)

The Release notes provide a list of useful topics and links for when you install IBM® Informix® database product or fix pack.


IBM Informix 12.10 is available in several different editions, and each offers different features and function.

For a complete list of what's new and changed in this release, go to

Information about the fixed defects for IBM Informix 12.10.xC12 is available at:


The product announcement letters are available at Search for Informix Version 12.10 and select Announcement letters. See the announcement for the following information:
  • Detailed product description
  • Product-positioning statement
  • Packaging and ordering details
  • International compatibility information

System requirements

For information about hardware and software compatibility, see the detailed system requirements document at

Installing IBM Informix 12.10.xC12

For step-by-step installation instructions, see Installing Informix at

The IBM Informix Installation Guide (ids_installg_12.10.pdf) is also available in the product build in PDF format.

If you are migrating from another version of Informix, make sure that you understand all migration requirements and restrictions before you install the product. For migration information, see

The "onsnmp" subagent and Blade Manager utility have been deprecated and will no longer be installed in the next release.

IBM Data Server driver, DataBlade Developers Kit (DBDK) and IBM OpenAdmin Tool (OAT) for Informix will no longer be packaged with the Informix server. The latest version of IBM Data Server driver can be downloaded from The latest version of OAT can be downloaded from

The latest open source drivers for Informix are available at

Known problems

At time of publication, the following problems were known:
  • If you uninstall Informix version 11.50, restart the computer before you install another version of Informix

    If you install Informix on a computer where you previously uninstalled version 11.50, the new installation might fail because the Informix database server Message Service (msgserv.exe) does not start.

    To avoid this problem, restart the computer before you install Informix again.

  • Windows firewall exception is needed before installation

    Before you install Informix on Windows operating systems, make a Windows firewall exception for the TCP listening port that is used by Informix. By default, the Informix port is 9088; however, you can specify a different port number during installation.

  • Removing users when you uninstall the database server

    If there are multiple installations of the product on the computer, and you are uninstalling one of the products, be careful when you use the Remove users and groups option. Do not remove users or groups that are required by the other installations of the product. If you remove users or groups that are required by the other products, the other products will not start or they will be inoperable.

  • Starting Informix instances

    To start an Informix instance, use the instance shortcut that is in the Informix program group. To start a 32-bit version of Informix on a 64-bit operating system (such as Windows 7), right-click the shortcut, and click Run as administrator.