# tIterateToFlow Transforms non processable data into a processable flow. tIterateToFlow transforms a list into a data flow that can be processed. ## tIterateToFlow Standard properties These properties are used to configure tIterateToFlow running in the Standard Job framework. The Standard tIterateToFlow component belongs to the Orchestration family. The component in this framework is available in all Talend products. ## Basic settings | Properties | Description | | --- | --- | | Schema and Edit
Schema |

A schema is a row description, it defines the number of fields that will be processed and passed on to the next component. The schema is either Built-in or remote in the Repository.

Click Edit schema to make changes to the schema. If the current schema is of the Repository type, three options are available:
- View schema: choose this option to view the schema only.
- Change to built-in property: choose this option to change the schema to Built-in for local changes.
- Update repository connection: choose this option to change the schema stored in the repository and decide whether to propagate the changes to all the Jobs upon completion.
  
  If you just want to propagate the changes to the current Job, you can select No upon completion and choose this schema metadata again in the Repository Content window.
Built-in: The schema will be created and stored locally for this component only. For more information about a component schema in its Basic settings tab, see Basic settings tab.
Repository: The schema already exists and is stored in the Repository, hence can be reused in various projects and Job designs. For more information about a component schema in its Basic settings tab, see Basic settings tab.

| | Mapping | Column: Enter a name for the
column to be created

Value: Press Ctrl+Space to access all of the available variables,
be they global or user-defined. | ## Advanced Settings | Properties | Description | | --- | --- | | tStatCatcher Statistics | Select this check box to collect the log data at a component
level. | ## Global Variables | Variables | Description | | --- | --- | | Global Variables | ERROR\_MESSAGE: the error message generated by the
component when an error occurs. This is an After variable and it returns a string. This
variable functions only if the Die on error checkbox is
cleared, if the component has this checkbox.

A Flow variable functions during the execution of a component
while an After variable functions after the execution of the component.

To fill up a field or expression with a variable, press Ctrl+Space to access the variable list and choose the variable to use from
it.

For more information about variables, see [Using contexts and variables](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/contexts-and-variables). | ## Usage | Usage guidance | Description | | --- | --- | | **Usage rule** | This component is not startable (green background) and it requires
an output component. | | Connections | Outgoing links (from this component to another):

Row: Main.

Trigger: Run if; On Component Ok;
On Component Error.

Incoming links (from one component to this one):

Row: Iterate;

For further information regarding connections, see [Using connections in a Job](https://help.qlik.com/talend/r/en-US/8.0/studio-user-guide/using-connections-in-job). | **Related concepts** * [Transforming a list of files as data flow](https://help.qlik.com/talend/en-US/components/8.0/orchestration/titeratetoflow-tfilelist-tlogrow-tlogrow-transforming-list-of-files-as-data-flow-standard-component-the)