APL - Invalid workspace in APL2

Author

Invalid workspace in APL2

Andreas Dopfer

2004-11-23, 3:55 am

Hi APL Experts,

I've got an IBM APL2 (MS Windows) workspace file which the interpreter
claims to be 'invalid'. Any hints how to find out what could be wrong
with that file? Is there any documentation on the structure of a
(valid) workspace file available or perhaps some open source APL
version, which is able to handle APL2 workspaces?

Thanks in advance.

Best regards,

Andreas

James J. Weinkam

2004-11-23, 3:55 am

Andreas Dopfer wrote:
> Hi APL Experts,
>
> I've got an IBM APL2 (MS Windows) workspace file which the interpreter
> claims to be 'invalid'. Any hints how to find out what could be wrong
> with that file? Is there any documentation on the structure of a
> (valid) workspace file available or perhaps some open source APL
> version, which is able to handle APL2 workspaces?
>
Sorry, I haven't any idea what the problem could be; but I would suggest that
you submit it, in greater detail if possible, to apl2@vnet.ibm.com.

If David Liebtag or Nancy Wheeler can't help you, you really have a problem.

Andreas Dopfer

2004-11-24, 3:55 am

James J. Weinkam wrote:
>
> Sorry, I haven't any idea what the problem could be; but I would suggest that
> you submit it, in greater detail if possible, to apl2@vnet.ibm.com.
>
> If David Liebtag or Nancy Wheeler can't help you, you really have a problem.

Thanks for your answer and for the address!

Unfortunately, I don't have much more information about the workspace
under consideration (it's not my file - I am only to repair it ...) As
far as I know, the APL2 interpreter crashed while executing some
function of the workspace (possibly one which uses some external DLL
routine). Afterwards, the workspace could not be loaded any more with
the )load command.

I was wondering if it is possible to get a little more information out
of the interpreter, regarding the faultiness of the file. The
displayed error message "ws invalid \ clear ws" could mean anything
between "I haven't got a clue about what type of file that is" and
"Actually, it's a completely valid ws file, apart from one single byte
missing at the end".

Regards,

Andreas

James J. Weinkam

2004-11-24, 8:55 am

Andreas Dopfer wrote:
> James J. Weinkam wrote:
>
>
>
> Thanks for your answer and for the address!
>
> Unfortunately, I don't have much more information about the workspace
> under consideration (it's not my file - I am only to repair it ...) As
> far as I know, the APL2 interpreter crashed while executing some
> function of the workspace (possibly one which uses some external DLL
> routine). Afterwards, the workspace could not be loaded any more with
> the )load command.
>
> I was wondering if it is possible to get a little more information out
> of the interpreter, regarding the faultiness of the file. The
> displayed error message "ws invalid \ clear ws" could mean anything
> between "I haven't got a clue about what type of file that is" and
> "Actually, it's a completely valid ws file, apart from one single byte
> missing at the end".
>
> Regards,
>
> Andreas
Andreas Dopfer wrote:
> James J. Weinkam wrote:
>
>
>
> Thanks for your answer and for the address!
>
> Unfortunately, I don't have much more information about the workspace
> under consideration (it's not my file - I am only to repair it ...) As
> far as I know, the APL2 interpreter crashed while executing some
> function of the workspace (possibly one which uses some external DLL
> routine). Afterwards, the workspace could not be loaded any more with
> the )load command.
>
> I was wondering if it is possible to get a little more information out
> of the interpreter, regarding the faultiness of the file. The
> displayed error message "ws invalid \ clear ws" could mean anything
> between "I haven't got a clue about what type of file that is" and
> "Actually, it's a completely valid ws file, apart from one single byte
> missing at the end".
>
> Regards,
>
> Andreas

Do you have a backup you can compare it to?

David Liebtag

2004-11-24, 3:55 pm

If you send it to us we may be able to determine a little more about it.

David Liebtag
IBM APL Products and Services

Andreas Dopfer

2004-11-25, 3:55 am

James J. Weinkam wrote:
>Do you have a backup you can compare it to?

We meanwhile indeed did find a backup!

David Liebtag wrote:
> If you send it to us we may be able to determine a little more about it.
>
> David Liebtag
> IBM APL Products and Services

Currently we are trying to reconstruct it with the backup file. If
unsuccessful, we would be very pleased if we could get back to your
offer.

Thanks a lot!

--
Andreas Dopfer
Institute for Logistics and Information Management
Faculty of Business Administration
University of Duisburg-Essen, Germany
http://www.uni-duisburg.de/FB5/BWL/PUI

Ted Edwards

2004-11-26, 8:55 pm

Andreas Dopfer wrote:

> I've got an IBM APL2 (MS Windows) workspace file which the interpreter
> claims to be 'invalid'.

Which version of APL2 was it saved from and which version are you
running?

I would make two suggestions:

1) Attempt to )COPY it into a clear WS.
2) If it was saved on a different version and can be read on that
version, use )OUT to write it out as an .ATF file and then use )IN on
your system.

Ted

David Liebtag

2004-11-29, 3:58 pm

If you send it to us we may be able to determine a little more about it.

David Liebtag
IBM APL Products and Services

Andreas Dopfer

2004-11-29, 3:58 pm

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