RESULTS of [mg 169] - InputString[] problem
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg209] RESULTS of [mg 169] - InputString[] problem
- From: p.kent at ic.ac.uk
- Date: Mon, 21 Nov 94 14:26:13 GMT
Thanks to everyone who responded to my posting. A few days later I got a response from WRI Technical Support which seems to clear up the matter. The problem is with "System V"-style Unix and a *network* Mathematica license. The license mechanism works by enquiring every few minutes during a Mathematica session whether the license is still valid (clever stuff, eh?). Now, when the kernel is sitting waiting for an input for InputString[], it is still querying the license server, and in System V Unix, the license server sends back a response which triggers the "EndOfFile" break. This has been registered by WRI as a bug, and a fix is being worked on. You won't see this problem with BSD-type Unix, or if you have a stand-alone Mma license, or if you're using any front dialog box). Nor will it occur on NeXT, Mac or PC machines. The Unix machines where this was observed to happen are: Sun SOLARIS (but not SunOS) HP Unix Silicon Graphics IRIX DEC OSF/1 and, presumably, any other System V-based Unix. Regards, Phillip Kent. ----------------------------------+---------------------------- Dr Phillip Kent | Email: p.kent at ic.ac.uk Transitional Mathematics Project | Mathematics Department | Tel: +44 (0)71 59 48503 Imperial College | Fax: +44 (0)71 59 48517 180 Queen's Gate | London SW7 2BZ | Project World-Wide-Web at: United Kingdom. | http://othello.ma.ic.ac.uk ----------------------------------+---------------------------- From root Thu Nov 24 07:37:41 1994 Received: by lead.wri.com id AA10905 (5.67b/IDA-1.4.4 for sw); Thu, 24 Nov 1994 07:37:41 -0600 Date: Thu, 24 Nov 1994 07:37:41 -0600 From: Operator <root> Message-Id: <199411241337.AA10905 at lead.wri.com> To: goyle, rory, sw Subject: Rdist Backup Report for /swolf3 woodlark: updating host woodlark woodlark: /swolf3/Archives/Mail/94-10.out: Warning: remote copy is newer woodlark: /swolf3/Archives/Mail/94-11.in: updating woodlark: /swolf3/Archives/Mail/94-11.out: updating woodlark: /swolf3/Archives/Cawley/Papers/flows.tex: No name for group 183 woodlark: /swolf3/Archives/Cawley/Papers/flows.tex: updating woodlark: /swolf3/private/vm/swapfile.front: updating woodlark: updating of woodlark finished