Unless the height of the rows has already been set to "At Least", or "Exactly", there is no way to determine the current height of the row. Querying the row height in VBA will return a value of "Undefined".

You will need to decide what the minimum height should be, then modify the code in post #2 to set the Height property

You know, the problem is I am OCR specialist and my software always defines table row height as "exactly". These heights vary depending on the table and I can't define the minimum height.

In my work computer there were the script on the outside platform that was doing this without any problems, so I thought it might be possible via VBA code. Apparently I was wrong

It is possible via VBA code, but you need to answer the same question as in the UI - at least what?

This is a decision that is usually taken at the time of designing the document, not applied after the fact when you already have tables with content and merged cells.