# Prerequisites

Before you begin to work with an IBM Informix database as a source in Qlik Replicate, make sure that the following prerequisites have been met:

* Qlik Replicate machine:

  * Qlik Replicate installed in your network.
  * IBM Informix ODBC Driver (64-bit) version 3.70 or later must be installed on the computer where Qlik Replicate is located.
  * The `DB_LOCALE=<Informix_db_locale_value>` environment variable must be set to be the name of the IBM Informix database locale from which you want to capture data.
  * The `INFORMIXSQLHOSTS` environment variable must be set to include the names of the IBM Informix servers that are available for use as Replicate source endpoints.

* IBM Informix Server:

  * An IBM Informix account with the required [Required permissions](https://help.qlik.com/en-US/replicate/May2025/Content/Replicate/Main/IBM%20Informix/security_req_informix.htm#ar_informix_3524105662_cihgbcgh).

  * CDC enabled. To enable CDC, run the script `$INFORMIXDIR/etc/syscdcv1.sql` on the IBM Informix server.

    Information note

    This requires DBA privileges (User 'IBM Informix' or another DBA user).

  * Make sure that the database to be replicated was created with either the `WITH LOG` or the `WITH BUFFERED LOG` property.