From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 08:07:31 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5D81416A41F; Wed, 30 Nov 2005 08:07:31 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from vsmtp3.tin.it (vsmtp3alice.tin.it [212.216.176.143]) by mx1.FreeBSD.org (Postfix) with ESMTP id 038F543D53; Wed, 30 Nov 2005 08:07:30 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from pswm4.cp.tin.it (192.168.70.20) by vsmtp3.tin.it (7.2.060.1) id 438843DB002073E6; Wed, 30 Nov 2005 09:07:37 +0100 Message-ID: <27183289.1133338049192.JavaMail.root@pswm4.cp.tin.it> Date: Wed, 30 Nov 2005 09:07:29 +0100 (GMT+01:00) From: Vittorio To: freebsd-cluster@freebsd.org Mime-Version: 1.0 Content-Type: text/plain;charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: 193.108.204.21 Cc: freebsd-questions@freebsd.org Subject: pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Vittorio List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 08:07:31 -0000 At office I'm trying to solve a heavy statistical problem by means of parallel computation with R and pvm. The problem is with setting up the cluster of computers which - to begin with - is made of two pentium 4 with freebsd 5.4 (host uffbsd) and 6.0 (host NbBSD). They see each other. From NbBSD: # ping uffbsd PING uffbsd.grtn.prv (10.155.194.115): 56 data bytes 64 bytes from 10.155.194.115: icmp_seq=0 ttl=64 time=0.221 ms 64 bytes from 10.155.194.115: icmp_seq=1 ttl=64 time=0.193 ms But trying to setup the virtual machine pvm> add NbBSD add NbBSD 0 successful HOST DTID NbBSD Duplicate host pvm> conf conf 1 host, 1 data format HOST DTID ARCH SPEED DSIG NbBSD.myd.prv 40000 FREEBSD 1000 0x00408841 pvm> add uffbsd add uffbsd 0 successful HOST DTID uffbsd Can't start pvmd Auto- Diagnosing Failed Hosts... uffbsd... Verifying Local Path to "rsh"... Rsh found in /usr/bin/rsh - O.K. Testing Rsh/Rhosts Access to Host "uffbsd"... Rsh/Rhosts Access FAILED - "uffbsd.myd.prv: Connection refused" Make sure host uffbsd is up and connected to a network and check its DNS / IP address. Also verify that NbBSD.myd.prv is allowed rsh access on uffbsd Add this line to the $HOME/.rhosts on uffbsd: NbBSD.myd.prv victor ........................................... Of course, in /home/victor/.rhost on uffbsd there's the required line. The same reciprocal situation happens from host uffbsd. Perhaps I'm missing something. Could you please help me? Vittorio From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 08:16:43 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8CB1016A41F; Wed, 30 Nov 2005 08:16:43 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from vsmtp12.tin.it (vsmtp12.tin.it [212.216.176.206]) by mx1.FreeBSD.org (Postfix) with ESMTP id 302B943D5F; Wed, 30 Nov 2005 08:16:43 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from pswm4.cp.tin.it (192.168.70.20) by vsmtp12.tin.it (7.2.060.1) id 438C4C410009CAF3; Wed, 30 Nov 2005 09:16:50 +0100 Message-ID: <15172522.1133338601993.JavaMail.root@pswm4.cp.tin.it> Date: Wed, 30 Nov 2005 09:16:41 +0100 (GMT+01:00) From: Vittorio To: freebsd-cluster@freebsd.org Mime-Version: 1.0 Content-Type: text/plain;charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: 193.108.204.21 Cc: freebsd-questions@freebsd.org Subject: R: pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Vittorio List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 08:16:43 -0000 Sorry, the correct ping is: # ping uffbsd PING uffbsd.myd.prv (10.155.194.115): 56 data bytes 64 bytes from 10.155.194.115: icmp_seq=0 ttl=64 time=0.221 ms 64 bytes from 10.155.194.115: icmp_seq=1 ttl=64 time=0.193 ms ........... That is the domain is myd. prv >----Messaggio originale---- >Da: vdemart1@tin.it >Data: 30-nov- 2005 9.07 AM >A: >Cc: >Ogg: pvm connection problems > >At office I'm trying to solve a heavy statistical problem by means of >parallel computation with R and pvm. >The problem is with setting up the >cluster of computers which - to begin with - is made of two pentium 4 >with freebsd 5.4 (host uffbsd) and 6.0 (host NbBSD). > >They see each >other. From NbBSD: > ># ping uffbsd >PING uffbsd.grtn.prv Vittorio From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 12:30:36 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7077916A41F; Wed, 30 Nov 2005 12:30:36 +0000 (GMT) (envelope-from vdm.fbsd@virgilio.it) Received: from vsmtp3.tin.it (vsmtp3alice.tin.it [212.216.176.143]) by mx1.FreeBSD.org (Postfix) with ESMTP id C28F043D66; Wed, 30 Nov 2005 12:30:35 +0000 (GMT) (envelope-from vdm.fbsd@virgilio.it) Received: from ppp-195-94-156-122.dialup.uni.it (195.94.156.122) by vsmtp3.tin.it (7.2.060.1) (authenticated as vdemart1@tin.it) id 438843DB00228DD7; Wed, 30 Nov 2005 13:30:42 +0100 From: Vittorio De Martino To: freebsd-cluster@freebsd.org Date: Wed, 30 Nov 2005 13:30:27 +0000 User-Agent: KMail/1.8.3 References: <27183289.1133338049192.JavaMail.root@pswm4.cp.tin.it> In-Reply-To: <27183289.1133338049192.JavaMail.root@pswm4.cp.tin.it> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200511301330.28340.vdm.fbsd@virgilio.it> Cc: freebsd-questions@freebsd.org Subject: rsh fails: [WAS] pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 12:30:36 -0000 Context: 2 pentium 4 boxes; freebsd 5.4 & 6.0 I detected that remote login via "rsh" doesn't work in my boxes: e.g. # rsh uffbsd uffbsd.myd.prv: Connection refused even though I've defined the trusted hosts on each box both in $HOME/.rhost= s=20 and in /etc/hosts.equiv.=20 I've also uncommented the shell lines in /etc/inetd.conf to no avail. What should I do to enable the (mistrusted) rsh connection? Vittorio Alle 08:07, mercoled=C3=AC 30 novembre 2005, Vittorio ha scritto: > At office I'm trying to solve a heavy statistical problem by means of > parallel computation with R and pvm. > The problem is with setting up the > cluster of computers which - to begin with - is made of two pentium 4 > with freebsd 5.4 (host uffbsd) and 6.0 (host NbBSD). > > They see each > other. From NbBSD: > > # ping uffbsd > PING uffbsd.myd.prv > (10.155.194.115): 56 data bytes > 64 bytes from 10.155.194.115: > icmp_seq=3D0 ttl=3D64 time=3D0.221 ms > 64 bytes from 10.155.194.115: > icmp_seq=3D1 ttl=3D64 time=3D0.193 ms > > But trying to setup the virtual > machine > > pvm> add NbBSD > add NbBSD > 0 successful > > HOST DTID > NbBSD Duplicate host > pvm> conf > conf > 1 > host, 1 data format > HOST DTID ARCH > SPEED DSIG > NbBSD.myd.prv 40000 FREEBSD 1000 > 0x00408841 > pvm> add uffbsd > add uffbsd > 0 successful > > HOST DTID > uffbsd Can't start pvmd > > Auto- > Diagnosing Failed Hosts... > uffbsd... > Verifying Local Path to "rsh"... > Rsh found in /usr/bin/rsh - O.K. > Testing Rsh/Rhosts Access to Host > "uffbsd"... > > Rsh/Rhosts Access FAILED - "uffbsd.myd.prv: Connection > refused" > Make sure host uffbsd is up and connected to > a network and > check its DNS / IP address. > Also verify that NbBSD.myd.prv is allowed > rsh access on uffbsd > Add this line to the $HOME/.rhosts on uffbsd: > NbBSD.myd.prv victor > ........................................... > > Of > course, in /home/victor/.rhost on uffbsd there's the required line. > The > same reciprocal situation happens from host uffbsd. > > Perhaps I'm > missing something. > Could you please help me? > Vittorio > > > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 13:20:33 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5BC1016A41F; Wed, 30 Nov 2005 13:20:33 +0000 (GMT) (envelope-from jhb@freebsd.org) Received: from speedfactory.net (mail6.speedfactory.net [66.23.216.219]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1F35C43D64; Wed, 30 Nov 2005 13:20:21 +0000 (GMT) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (unverified [66.23.211.162]) by speedfactory.net (SurgeMail 3.5b3) with ESMTP id 2869513 for multiple; Wed, 30 Nov 2005 08:18:18 -0500 Received: from zion.baldwin.cx (zion.baldwin.cx [192.168.0.7]) (authenticated bits=0) by server.baldwin.cx (8.13.1/8.13.1) with ESMTP id jAUDKHAB080362; Wed, 30 Nov 2005 08:20:17 -0500 (EST) (envelope-from jhb@freebsd.org) From: John Baldwin To: freebsd-cluster@freebsd.org Date: Wed, 30 Nov 2005 08:15:53 -0500 User-Agent: KMail/1.8.3 References: <27183289.1133338049192.JavaMail.root@pswm4.cp.tin.it> <200511301330.28340.vdm.fbsd@virgilio.it> In-Reply-To: <200511301330.28340.vdm.fbsd@virgilio.it> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200511300815.54607.jhb@freebsd.org> X-Spam-Status: No, score=-2.8 required=4.2 tests=ALL_TRUSTED autolearn=failed version=3.0.2 X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on server.baldwin.cx X-Server: High Performance Mail Server - http://surgemail.com r=1653887525 Cc: Vittorio De Martino , freebsd-questions@freebsd.org Subject: Re: rsh fails: [WAS] pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 13:20:33 -0000 On Wednesday 30 November 2005 08:30 am, Vittorio De Martino wrote: > Context: 2 pentium 4 boxes; freebsd 5.4 & 6.0 > > I detected that remote login via "rsh" doesn't work in my boxes: > e.g. > # rsh uffbsd > uffbsd.myd.prv: Connection refused > > even though I've defined the trusted hosts on each box both in > $HOME/.rhosts and in /etc/hosts.equiv. > I've also uncommented the shell lines in /etc/inetd.conf to no avail. > > What should I do to enable the (mistrusted) rsh connection? > > Vittorio Do you have inetd enabled (inetd_enable=3D"YES" in /etc/rc.conf) and is it= =20 running? =2D-=20 John Baldwin =C2=A0<>< =C2=A0http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" =C2=A0=3D =C2=A0http://www.FreeBSD.org From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 15:01:19 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1940116A422; Wed, 30 Nov 2005 15:01:19 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from vsmtp14.tin.it (vsmtp14.tin.it [212.216.176.118]) by mx1.FreeBSD.org (Postfix) with ESMTP id 21C0843D7B; Wed, 30 Nov 2005 15:01:08 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from pswm13.cp.tin.it (192.168.70.37) by vsmtp14.tin.it (7.2.060.1) id 4379C5D500733A5B; Wed, 30 Nov 2005 16:01:15 +0100 Message-ID: <29454079.1133362866590.JavaMail.root@pswm13.cp.tin.it> Date: Wed, 30 Nov 2005 16:01:06 +0100 (GMT+01:00) From: Vittorio To: Mime-Version: 1.0 Content-Type: text/plain;charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: 193.108.204.21 X-Priority: 2 (High) Cc: freebsd-questions@freebsd.org Subject: R: Re: rsh fails: [WAS] pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Vittorio List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 15:01:19 -0000 >----Messaggio originale---- >Da: jhb@freebsd.org >Data: 30-nov-2005 2.15 PM >A: >Cc: "Vittorio De Martino" , >Ogg: Re: rsh fails: [WAS] pvm connection problems > >On Wednesday 30 November 2005 08:30 am, Vittorio De Martino wrote: >> Context: 2 pentium 4 boxes; freebsd 5.4 & 6.0 >> >> I detected that remote login via "rsh" doesn't work in my boxes: >> e.g. >> # rsh uffbsd >> uffbsd.myd.prv: Connection refused >> >> even though I've defined the trusted hosts on each box both in >> $HOME/.rhosts and in /etc/hosts.equiv. >> I've also uncommented the shell lines in /etc/inetd.conf to no avail. >> >> What should I do to enable the (mistrusted) rsh connection? >> >> Vittorio > >Do you have inetd enabled (inetd_enable="YES" in /etc/rc.conf) and is it >running? > Actually no, but... >From the standpoint of my first box, NbBSD (freebsd 6.0) I did the following steps 1) added inetd_enable="YES" at the end of /etc/rc.conf 2) modified /etc/inetd. conf uncommenting the line shell stream tcp nowait root /usr/libexec/rshd rshd (I don't know if it helps, anyway!) 3) /etc/rc.d/inetd start 4) I've checked the presence of inetd via top. It existed!! 5) Under user victor there's a .rhosts file containing: uffbsd.myd.prv victor (user victor exists on the box uffbsd and uffbsd.myd.prv is also present in the box NbBSD in /etc/hosts: I can ping it!) 6) I reciprocate the same configuring steps on the other machine uffbsd. Well in the end: # rsh uffbsd uffbsd.myd.prv: Connection refused Please help Vittorio From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 15:19:46 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2C4CB16A41F; Wed, 30 Nov 2005 15:19:46 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from mail.localelinks.com (web.localelinks.com [65.170.254.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id C6AB243D58; Wed, 30 Nov 2005 15:19:43 +0000 (GMT) (envelope-from fullermd@over-yonder.net) Received: from draco.over-yonder.net (adsl-222-80-86.jan.bellsouth.net [68.222.80.86]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.localelinks.com (Postfix) with ESMTP id 8EFE4AD; Wed, 30 Nov 2005 09:19:42 -0600 (CST) Received: by draco.over-yonder.net (Postfix, from userid 100) id E2A4661C20; Wed, 30 Nov 2005 09:19:38 -0600 (CST) Date: Wed, 30 Nov 2005 09:19:38 -0600 From: "Matthew D. Fuller" To: Vittorio Message-ID: <20051130151938.GD39831@over-yonder.net> References: <29454079.1133362866590.JavaMail.root@pswm13.cp.tin.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <29454079.1133362866590.JavaMail.root@pswm13.cp.tin.it> X-Editor: vi X-OS: FreeBSD User-Agent: Mutt/1.5.11-fullermd.2 Cc: freebsd-questions@freebsd.org, freebsd-cluster@freebsd.org Subject: Re: R: Re: rsh fails: [WAS] pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 15:19:46 -0000 On Wed, Nov 30, 2005 at 04:01:06PM +0100 I heard the voice of Vittorio, and lo! it spake thus: > > 6) I reciprocate the same configuring steps on the other > machine uffbsd. > > Well in the end: > # rsh uffbsd > uffbsd.myd.prv: > Connection refused rsh with no arguments uses rlogind, not the rshd. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream. From owner-freebsd-cluster@FreeBSD.ORG Wed Nov 30 16:03:27 2005 Return-Path: X-Original-To: freebsd-cluster@freebsd.org Delivered-To: freebsd-cluster@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 24FA416A41F; Wed, 30 Nov 2005 16:03:27 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from vsmtp14.tin.it (vsmtp14.tin.it [212.216.176.118]) by mx1.FreeBSD.org (Postfix) with ESMTP id AFA6D43D79; Wed, 30 Nov 2005 16:03:26 +0000 (GMT) (envelope-from vdemart1@tin.it) Received: from ppp-195-94-156-122.dialup.uni.it (195.94.156.122) by vsmtp14.tin.it (7.2.060.1) (authenticated as vdemart1@tin.it) id 4379C5D50073EF5B; Wed, 30 Nov 2005 17:03:33 +0100 From: vittorio To: freebsd-cluster@freebsd.org Date: Wed, 30 Nov 2005 17:03:18 +0000 User-Agent: KMail/1.8.3 References: <29454079.1133362866590.JavaMail.root@pswm13.cp.tin.it> <20051130151938.GD39831@over-yonder.net> In-Reply-To: <20051130151938.GD39831@over-yonder.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Message-Id: <200511301703.19800.vdemart1@tin.it> Cc: freebsd-questions@freebsd.org Subject: Re: R: Re: rsh fails: [WAS] pvm connection problems X-BeenThere: freebsd-cluster@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Clustering FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Nov 2005 16:03:27 -0000 Alle 15:19, mercoled=EC 30 novembre 2005, Matthew D. Fuller ha scritto: > On Wed, Nov 30, 2005 at 04:01:06PM +0100 I heard the voice of > > Vittorio, and lo! it spake thus: > > 6) I reciprocate the same configuring steps on the other > > machine uffbsd. > > > > Well in the end: > > # rsh uffbsd > > uffbsd.myd.prv: > > Connection refused > > rsh with no arguments uses rlogind, not the rshd. Thanks to the suggestions in this mailing-list, after enabling rlogind in=20 inetd.conf and restarting the service now rsh works! $ rsh uffbsd Password: Last login: Wed Nov 30 16:02:31 on ttyp0 Copyright (c) 1992-2005 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. =46reeBSD 5.4-RELEASE (SERVER3) #0: Mon Nov 7 18:07:20 CET 2005 Welcome in FreeBSD! uffbsd victor# exit rlogin: connection closed BUT...... pvm goes on complaining as at the very beginning of this thread that: victor$ pvm pvm> add NbBSD add NbBSD 0 successful HOST DTID NbBSD Duplicate host pvm> add uffbsd add uffbsd 0 successful HOST DTID uffbsd Can't start pvmd Auto-Diagnosing Failed Hosts... uffbsd... Verifying Local Path to "rsh"... Rsh found in /usr/bin/rsh - O.K. Testing Rsh/Rhosts Access to Host "uffbsd"... Rsh/Rhosts Access FAILED - "rshd: Login incorrect." Make sure host uffbsd is up and connected to a network and check its DNS / IP address. Also verify that NbBSD.myd.prv is allowed rsh access on uffbsd Add this line to the $HOME/.rhosts on uffbsd: NbBSD.myd.prv victor =2E.............. =2E................ Now user victor on the uffbsd box had been defined via adduser as a normal= =20 user with password.Thinking the the problem was the password, I deleted it= =20 and recreated this user as passwordless but rsh fails asking for a password all the same and pvm fails with identical diagnostic.=20 Please help again Vittorio