How do I change the hatch boundary in a dynamic block?

[jim3thornton]

I have a 7'-4" w X 8'-0" h roll up door BLOCK.  

With changing site conditions, I want to convert this static block in a dynamic block.  

The perimeter is a rectangle with a hatch pattern representing the horizontal slats.  

I am able to assign the stretch action to the rectangle, but the hatch pattern does not increase in height.

Instead the hatch pattern moves upward with the stretch.

I have tried changing the hatch pattern to associative through the block editor, but that command is null.

Is there something I am missing is this process?

I know I can use the ArrayRec Command with multiples of a horizontal lines, but I have not tested it in a dynamic block.

I am presuming there is another way to introduce additional horizontal lines as the height increases, but I have not found that command yet.

Any input would be helpful.

thank you 

[Libbya · Accepted solution]

Remake the hatch pattern as associative from the start.  The stretch the hatch boundary (making sure it stays closed) and do *not* stretch the hatch.  Post your specific block for more pertinent assistance.