Hello,Does anyone have a zgrid.lsp ? if so please upload here.thanks

What should it do? Guessing by the name, you might use something like our PtMesh or DrGrid. See:https://www.cadforum.cz/cadforum_en/reading-3d-point-matrix-from-a-csv-file-tip11076https://www.cadforum.cz/cadforum_en/drgrid-parametric-grid-for-autocad-drawings-tip9829

... or are you after something related to >this< kind of thing?

Somehow that link didn't come through viably.  Try:https://www.mathworks.com/help/control/ref/zgrid.html