Did that, killed that file. I let the install program installing pen for os/2, this time it did run, but with the instruction not to update my config.sys. First thing I did was going to the config.sys from pen for os/2. It didn't seem harmfull what it wanted to do, so I swapped files and give it a try. The first problem was ibmlanlk which stopped the system. Did boot to maintenance partition, did put a rem before the line in the config.sys on main system and try again. No succes, again halted system with an error of internal revision something. Puzzled. Did go back, renamed the config.sys and copied my old back, restart and here we are. Now you use pen for os/2, as what I read with eCS 2.x, I'm still on 1.2 Dutch. Any suggestions in what corner I have too look?