# Add the step ID to the configuration file

The configuration file, `org.pentaho.pdi.engine.spark.cfg`, contains the **forceCoalesceSteps** property. The property is a pipe-delimited listing of all the IDs for the steps that should run with a coalesced dataset. Pentaho supplies a default set to which you can add IDs for steps that generate errors.

Perform the following steps to add another step ID to the configuration file:

1. Navigate to the `data-integration/system/karaf/etc` folder on the edge node running the AEL daemon and open the `org.pentaho.pdi.engine.spark.cfg` file.
2. Append your step ID to the **forceCoalesceSteps** property value list, using a pipe character separator between the step IDs.
3. Save and close the file.