When you run a message for testing purposes, you can use a tracer to register what the message does when it is run. When the message has run using the tracer, you can review the registered actions in the tracer. Usually, you use this to find issues in the message run.

Standard procedure

1.	Click Connectivity studio Integration Design.
2.	In the list, find and select the desired record.
3.	Click Tracer.
4.	For each mapped source record, a node is created in the tree. Example: If you have imported three records, three root nodes are created in the tree. Use the tree to navigate to the desired record.
	In the tree, select 'the source record that you want to review'.
5.	The action list shows, for each processed record, the actions that are done during the message run. For each record, the actions are listed in the order in which they are done.
	In the action list, find and select the desired action.
6.	If you have selected a Map field action, the Mapping section shows the applicable field.
	Expand the Mapping section.
7.	The Source record section shows the values of the source record fields. In case of an: - Export, all fields of the source record table in D365 FO are shown. So, also the not-mapped table fields are shown. - Import, all fields are shown, that are defined for the applicable record in the source document. So, also the not-mapped document record fields are shown.
	Expand the Source record section.
	Note: In case of an export message, you can show or hide the system fields of the source record table.
8.	The Target record section shows the values of the target record fields. In case of an: - Import, all fields of the target record table in D365 FO are shown. So, also the not-mapped table fields are shown. If a field value is changed, also the previous value is shown. - Export, all fields are shown, that are defined for the applicable record in the target document. So, also the not-mapped document record fields are shown.
	Expand the Target record section.
	Note: In case of an import message, you can show or hide the system fields of the target record table.
9.	In case of an import message, the Effected by section, shows the fields, which values are automatically changed based on the value as set in the target record field. Example: In the target record field, the ZIP code is changed. As a result, automatically the City field is changed accordingly.
	Expand the Effected by section.
10.	Close the page.