HI Ivaylo
When ever i select the parent table i will hide all the child table and show only the relevant child table. Thats why I put some TimeOut of 500 mili second before calling start edit. still i got this error.
As per your second option.
All the three child table are different component for eg (<vis-table></vis-table>, <var-table></var-table>, <att-table></att-table> )
You can see the template for parent which is shown above .
Thanks
Ankur Shah