Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!hp4nl!alchemy!ruunfs!mos From: mos@fys.ruu.nl (Henk Mos) Newsgroups: comp.unix.ultrix Subject: Re: Fortran weirdnesses Message-ID: <1991May1.220455.11441@fys.ruu.nl> Date: 1 May 91 22:04:55 GMT References: Organization: Physics Department, University of Utrecht Lines: 39 In hudgens@sun13.SCRI.FSU.EDU (Jim Hudgens) writes: >This is on a Decstation 5000, Ultrix 4.1, f77 == U4V2.0p. >Anyone ever seen anything like this??? A GKS window appears, >and then the dbx drops out with the "I/O possible" message. Anyone >know what might be causing this? We have the same problems with 2.0. After creating a window (GKS3D) the first line you draw will not show up. But there are more serious problems with 2.0. Compiling with -O3 will give a very good speedup because sometimes DO loops will just be skipped! We just received the new 3.0 (2.1 has the same problems) but... Have a look: program test a = 3. b = 2(a) c = 2**3(a) write (6,*) b, c end This will compile (3.0) without any errors and the results are: 3.00000 24.00000 There are memory allocation and floating points problems as well, but they are very difficult to locate. There seems to be an update so we'll see. Henk Mos -- ---------------------------------------------------------------------- Henk J. Mos, Dept of Physics and Astrophysics, Utrecht University The Netherlands. Phone: 31-30-532239 Email: mos@fys.ruu.nl ----------------------------------------------------------------------