# Installing and transferring data again

If an issue occurs during data transfer and the fix involves changing the etl.properties file, you must install the ETL utility again, and then start the data transfer process again from the beginning.

Step 1: Install the ETL utility again.

For instructions, see Editing the etl.properties file and installing the ETL utility again.

Step 2: Transfer data again.

1. In a command shell, set your current directory to the location where you unpacked the installation ZIP file, Healthcare-CDM4_ETL_xxx.zip, where xxx refers to the build number.

   For example:

   $ cd /u01/stage/cdm4etl

2. If you created one or more configurations in the Empirica Healthcare Analysis database during your last attempt at data transfer, provide different names for the configurations:
   1. Open the etl.properties file in a text editor, such as vi.
   2. Edit the properties as needed. For descriptions of each property, see Setting installation and data transfer settings.
3. Execute the ETL script:

   SQL>@start_etl

   The start_etl.log file is overwritten in the current directory.

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