Hello, I recall from a visit at City University in London that they had just the basic tools in their default paths and added specialised software only upon the execution of some script. I did not like this back then, but with the hindsight of the conflicts with plink, I feel that this is rather helpful to have. There may be better paths than /usr/lib/ns/med/bin. What is the feeling on the list about such a solution? Best, Steffen