error: Automation Error. Description was not provided.

Hello,


I am stumped on this error. Can anyone explain why it occurs?

error: Automation Error. Description was not provided.


Regards
Rakesh

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</PRE>

 

Rakesh:
That could mean anything for which a specific catch-all-error-message wasn't
provided. How about narrowing down the possibilities by wrapping each one in a
catch-all? Better yet, do a dump on the questionable object to see what may not
be available. My guess is that you might be trying to access something like a
Land Desktop project without the application being present. A lot of the the
LDT ActiveX properties and methods return such non-descriptive error messages if
the needed application is either not loaded or not initialized.

Posting code can help us to help you too.

 

Rakesh - Visual LISP sometimes fails to obtain the specific
error message that an ActiveX server returns (and sometimes
the ActiveX server fails to provide specific error messages),
so this particular error message is Visual LISP's way of saying
that it either can't obtain the exact error message, or that
no specifc error message was provided by the ActiveX server.

I'm afraid that you will need to indicate what object/method
or property you're attempting to access in order to determine
what may be causing the problem.

John's suggestion will not work, since it has nothing to do
with (vl-catch-all-xxxxx), as error is in the ActiveX server
you're using, not in LISP code.



Copyright (c)2004 Tony Tanzillo
Unauthorized reproduction expressly prohibited.

 

Hello Tony and John,

Here is the sample code from AutoCAD Map 2002. I hope this will help you.

Please note that this error occurs in a drawing that is not the current
drawing. I open a number of drawings in MDI (Multiple Document
Interface) mode using the "Open" method of the AutoCAD application and
this error shows up when it processes one of the open documents.

(setq
cRecords (vlax-invoke-method odTable "GetODRecords")
retVal (vlax-invoke-method cRecords "Init" oname :vlax-false
:vlax-false)
)

(if retVal
(progn
(setq cRecord (vlax-invoke-method cRecords "Record")) ))


The above line ("Record" method call) throws up this error shown below:

error: Automation Error. Description was not provided.

Any help is appreciated.

Regards
Rakesh

--

AutoCAD customization for Engineering/Mapping/GIS
Get GeoTools @ http://www.4d-technologies.com/geotools
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</PRE>

 

Hi Tony and John,

Thank you for your answers. I am posting a portion of the code below.
The trouble is that this error shows up in another (non-current) drawing
and not the current one. I am using the ActiveX functions to open many
drawings in the MDI mode and this error shows up in one of the open
drawings when I attempt to process it.

I tried the same thing using (vl-catch-all... exception handling
functions and the same error shows up.



(setq
cRecords (vlax-invoke-method odTable "GetODRecords")
retVal (vlax-invoke-method cRecords "Init" oname :vlax-false
:vlax-false)
)

(if retVal
(progn
(setq cRecord (vlax-invoke-method cRecords "Record")) ))


The above line ("Record" method call) throws up this error shown below:

error: Automation Error. Description was not provided.

Any help is appreciated.

--

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Get GeoTools @ http://www.4d-technologies.com/geotools
Build MyGeoTools @ http://www.4d-technologies.com/geotools/my_geotools.htm
FREE downloads : http://www.4d-technologies.com/techcenter
</PRE>

 

Rakesh - The Record method is failing, but I can't tell you
why (that can be for any number of reasons).

Have you tried checking the IsDone property of the ODRecords
object before you try to call Record, to see if there are any
records in the collection?



Copyright (c)2004 Tony Tanzillo
Unauthorized reproduction expressly prohibited.

 

Sorry, Rakesh. I've never used the Map ActiveX server, but only the ADE*
functions. Never meant to imply that (vl-catch-all...) would solve your problem
but rather might help to define the problem in case you weren't sure what call
returned the error. At this point, since you've combined two calls into one
(setq), I think you ought run them separately and dump each object if in fact
they returned, including the odtable and oname objects you haven't disclosed.

 

Just a word of advice. Using (vl-catch-*) functions
to find the LISP or ActiveX method call that's failng
isn't the easiest way to go.

Just replace your default error handler with
this one:

(defun *error* (msg)
(vl-bt)
(princ (strcat "\nError: " msg))
(princ)
)




Copyright (c)2004 Tony Tanzillo
Unauthorized reproduction expressly prohibited.

 

Not sure how vl-catch-* helps in that regards.

It seems to me that it would be
a lot easier to just do this:

(defun *error* (msg) (vl-bt) (princ))



Copyright (c)2004 Tony Tanzillo
Unauthorized reproduction expressly prohibited.

 

Have to agree that's easier. Don't know how helpful the report is. I was
thinking along the lines of dumping the object that was causing the problem, but
you could do that without (vl-catch...).