Create a Child Table Using Table Control | IBM Maximo

1. First, drag and drop a table control in Maximo, set properties as below:

Data Source Id:            main_tasks_table
Relationship:               Master_Detail_Relation (master to detail main relationship)

2. Drag a Default value control and set properties as below:

From Data Source ID: MAINRECORD

From Attribute: ParentTableID

Attribute: ChildTableID

--------------

or it can be done with an automation script.

For instance, the table ( prchild ) is a child of the PR table. So just write an automation script and name it as below:

NAME: PRCHILD.NEW

owner=mbo.getOwner()
if owner and owner.isBasedOn("PR"):
    mbo.setValue("PRNUM",owner.getString("PRNUM"))
    mbo.setValue("SITEID",owner.getString("SITEID"))