How to add child rows in sets of two or more consecutive rows in a table of a PDF in a Doc Template?

[Vaibhav_Traders]

Hello everyone!

Hope doing well. I got stuck in a problem that might be solvable. I'm creating a PDF file. Everything is simple. 

[Picture 1]

[Picture 2]

The two images will clearly depicts my problem.

I want to add child rows' values in the sets of two consecutive rows of a table [Picture 1]. Like, the values of first row of a child table in first two rows of a table in a PDF. And, then again second row's values in the third and fourth rows of a table in a PDF, and so on...

I'm doing this because all values of a child's row cannot be added in a single row of a table, as these PDFs are to be printed on a paper, and small font size shall not be properly readable!

However, I'm incurring an error (shown in [Picture 2]). Is there any way to solve this problem?

Thanks in anticipation!
@Steve , @Suvrutt_Gurjar , @AleksiAlkio and others 🙂