# tMomRollback Cancels the transaction committed in the MQ Server. ## tMomRollback Standard properties These properties are used to configure tMomRollback running in the Standard Job framework. The Standard tMomRollback component belongs to the Internet family. The component in this framework is available in all Talend products. ## Basic settings | Properties | Description | | --- | --- | | Component List | Select the component used in your Job. | | Backout messages to backout queue
(WebsphereMQ) | Select this check box to backout the messages to the backout queue
defined in the Websphere MQ manager when the backout count reaches
the configured threshold which is a property of the queue in the
Websphere MQ server.

If a tMomConnection component is selected from Component List, the messages processed by all tMomInput components that reuses the connection created by the selected tMomConnection component will be backouted.
If a tMomInput component is selected from Component List and the Use existing connection check box in the Basic settings view of the tMomInput component is cleared, the messages processed by the selected tMomInput component will be backouted.
If a tMomInput component is selected from Component List and the Use existing connection check box in the Basic settings view of the tMomInput component is selected, the messages processed by all tMomInput components that reuses the same connection the selected tMomInput component reused will be backouted.
If a tMomOutput component is selected from Component List and the Use existing connection check box in the Basic settings view of the tMomOutput component is cleared, no messages will be backouted.
If a tMomOutput component is selected from Component List and the Use existing connection check box in the Basic settings view of the tMomOutput component is selected, the messages processed by all tMomInput components that reuses the same connection the selected tMomOutput component reused will be backouted.

Note that this check box works only when the Commit (delete message after read from the queue),
Backout messages to input
queue, Backout messages to backout
queue (when backoutCount of message reach the threshold
value), and Browse
message check boxes of all tMomInput components in the same Job are
cleared. | | Close Connection | Clear this check box to continue to use the selected connection
once the component has performed its task. | ## Advanced settings | Properties | Description | | --- | --- | | tStatCatcher Statistics | Select this check box to collect log data at the 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 more commonly used with other tMom\* components,
especially with the tMomConnection
and tMomCommit components. |