[26169] in Athena Bugs
Problem with Maple 9.5
daemon@ATHENA.MIT.EDU (cda@mit.edu)
Mon Nov 1 19:39:41 2004
Date: Mon, 1 Nov 2004 19:39:19 -0500 (EST)
From: cda@mit.edu
Message-Id: <200411020039.iA20dJBJ018707@kuzco.mit.edu>
To: bugs@mit.edu
cc: Derek Rowell <drowell@mit.edu>
cc: cda@mit.edu
Reply-To: olc@mit.edu
Errors-To: bugs-bounces@mit.edu
--------
Dear Athena Bugs:
Please see the enclosed message from Professor Rowell, describing a bug
with Maple 9.5's execution of .m files...
Thank you,
-chris avrich
Athena Consultant (OLC)
>> Date: Mon, 01 Nov 2004 12:39:58 -0500
>> To: olc-maple@mit.edu
>> From: Derek Rowell <drowell@MIT.EDU>
>> Subject: Bug(?) in Maple 9.5
>>
>> For the past ten years I have published on the web and used in my courses a
>> Maple "package" Syrep for dynamic system analysis. It has work under
>> Maple 4,5,6,7,8,9.0 without problems. I found last week that it gives
>> errors under Maple 9.5, and after working on it the whole weekend I am now
>> convinced that the problem lies within Maple 9.5
>> The package may be seen and downloaded
>> at http://web.mit.edu/drowell/www/syrep/
>>
>> Here's the problem as I understand it:
>> I have historically distributed it as a Maple '.m' internal Maple
>> language file. This makes it easy for users to download the code and
>> access it with a read statement from any user directory. It works well in
>> Maple 9.0, but gives multiple and different errors under 9.5. I have
>> tried resaving it under 9.5, same errors. The code works fine if run with
>> the source worksheet syrep.mws loaded. But as soon as it is saved to
>> syrep.m and reloaded, it fails. I have concluded that my Mape code is ok,
>> the problem is in the saving and reloading. I have tried saving the
>> procedures to a Maple repository and the same thing happens - if I invoke
>> them from the repository they fail the same way as from the syrep.m
>> file. Note that I can use those very same repositories and .m files with
>> Maple 9.0 without problems.
>> The code is 4-5000 lines long. It uses the "networks", "linalg", and
>> "inttrans" Maple packages.
>> One common failure in 9.5 seems to be on a call to fundcyc() in
>> networks, where it reports an error in the calling argument types to
>> [networks]delete(). I do not call delete() explicitly anywhere. I have
>> isolated it to the particular call to fundcyc() and the arguments passed
>> seem fine.
>>
>> As a short term fix I am distributing the software as a maple input .mlp
>> file, which is simply a text version of the source code. That works well,
>> but I am unhappy about making my source available to the world at large.
>>
>> I am puzzled as to why this code has worked on all previous versions
>> of Maple, including 9.0, but will not work with 9.5. I would be happy to
>> work with anybody to solve it, or to work with Maplesoft directly. It is
>> important to me to find the solution.
>>
>> How might we proceed?
>>
>> Thanks
>> Derek Rowell
>>
>> ======================================================
>> Derek Rowell, Professor phone: (617) 253-6206
>> Department of Mechanical Engineering fax: (617) 258-7018
>> Massachusetts Institute of Technology email: drowell@mit.edu
>> Room 3-142
>> 77 Massachusetts Avenue
>> Cambridge MA, 01239
>> ======================================================
