Check your paths, Harry. XY4 should run identically in vDos-lfn as it did in your previous environment but you need the paths to XY4 and vDos-lfn set in AUTOEXEC.TXT.Paul On 15/07/2016 18:07, Harry Binswanger wrote: I am unclear what I use instead of STARTUP.INT. I didn't find anything in MANUAL.TXT or the list emails about that. I am able to run my existing STARTUP.INT, but I have to call it manually.