What sad news! I'm very sorry to hear it. Please convey my deep sympathies to his family and his colleagues in z/VM development.
I worked with Mark many times over the years. I especially remember when DIRMAINT went through a major re-write and there were quite a few issues to be resolved. Mark was always a professional and very patient with his demanding customers. Wasn't he also involved with PROP and HMF for awhile too? My memory has faded, but I recall working with him on something other than DIRMAINT too, but perhaps it was something else. In any case, he will be greatly missed by all who worked with and knew him. Martha
