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"Failed to Describe Class" Error

37 REPLIES 37
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Message 1 of 38
tjmapper
1113 Views, 37 Replies

"Failed to Describe Class" Error

Using Map 3D 08 I am connecting to SDF files with links to Access database. Once i setup a map it works perfectly for a while. Next day or 2 I start it up and I start getting "Failed to Describe Class" Error and Feature layers start to disappear.

I can connect to the SDF's in a new drawing and they work fine, but still give me the same after a layer feature refresh and update in the original drawing. Im trying to get setup to use SDF full time, but I dont want to have to Make a new map every 2-3 days just to do it.

Thanks in advance for your help. Here is the Log of the error


?xml version="1.0" ?
- Map3dErrorLog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="AcMap3dErrorLog.xsd"
-Session user="TJordan" start="7/11/2008 11:39:21 AM" document="G:\Maps\WSA Infrastructure.dwg"
Error code="1" type="15" dispensation="3" sId="2" occurrence="1"Failed to describe class./Error
Error code="1" type="15" dispensation="3" sId="3" occurrence="1"Failed to describe class./Error
- Error code="1" type="15" dispensation="3" sId="4" occurrence="1"
Failed to describe class.
Entry code="1" type="15" sId="5" occurrence="8"Failed to describe class./Entry
/Error
- Error code="1" type="15" dispensation="3" sId="13" occurrence="1"
Cannot get layer description.
Entry code="1" type="15" sId="14" occurrence="1"Failed to describe class./Entry
/Error
- Error code="1" type="15" dispensation="1" sId="15" occurrence="1"
Failed to describe class.
Entry code="1" type="15" sId="16" occurrence="8"Failed to describe class./Entry

/Session
/Map3dErrorLog

Message was edited by: Tjmapper
37 REPLIES 37
Message 21 of 38
TomWilgaWH
in reply to: tjmapper

Well, when I created the SDF's, I created the schema based on the type of equipment I'm inputting.

For instance, Poles, Switches, Meters, etc are all point geometry. Parcels are surface geometry and cables are line geometry.

I also created a 'Redline' layer of which contains all 3 types of geometry.

Overall, I don't think that would be an issue.

I don't use the bulk copy method unless I'm converting my SDF to SHP to give to our City.

I did use bulk copy once at the very beginning of this project when I set all the features up.

Again, I don't think this would be the cause of all our problems. I'll try some tests though.
--------------------------------------------------
Thomas Wilga
Engineering Technician
GIS Coordinator
Field Inspector

Welland Hydro-Electric Systems Corp.
Message 22 of 38
tjmapper
in reply to: tjmapper

Ya, i admit it might be a stretch, but I'm trying to exhaust all my possibilities.

When an error talks about "Class" it makes me think about the schema.

I'll Let you know.
Message 23 of 38
TomWilgaWH
in reply to: tjmapper

I think you're along the right lines though...

Maybe there's just something messed up with the feature class and how it's set-up.
--------------------------------------------------
Thomas Wilga
Engineering Technician
GIS Coordinator
Field Inspector

Welland Hydro-Electric Systems Corp.
Message 24 of 38
JohnPM
in reply to: tjmapper

Is it possibly a permissions problem with Access tables. Assuming that another computer does not have the same problem I would check file sharing and permissions for read/write access to the database.

John
Message 25 of 38
tjmapper
in reply to: tjmapper

Thanks for our input John.

If it were a permissions issue would it not give the error for all features coming from that data source? because that is not the case for me. Some work and some give the error at the same time from the same database.
Message 26 of 38
TomWilgaWH
in reply to: tjmapper

So how has this been working for you guys?

For myself, everything has been going strong, and I haven't had any errors yet, knock on wood. It's been a few weeks since I last had one.

Hopefully everyone else has had success?
--------------------------------------------------
Thomas Wilga
Engineering Technician
GIS Coordinator
Field Inspector

Welland Hydro-Electric Systems Corp.
Message 27 of 38
tjmapper
in reply to: tjmapper

No such luck for me.
Message 28 of 38
tjmapper
in reply to: tjmapper

Well our GIS department has gone live with using the SDF format and we are still getting this error. Everytime it comes up i just scurry over and ask them to close it out then proceed to make a new drawing and save it in its place before anyone notices. Not exactly what i had in mind for a great mapping system. If its not 'Failed to describe Class" its "FDO preperation failed" or "Failed to query" or disappearing water lines, or features being selected that are outside a selection box. I am so glad i talked my supervisor into converting to this. I really only hope it is because of my own negligence, but i cant seem to find ANYONE in the southeast that knows anymore about this stuff. Even our reseller is in the dark.
Message 29 of 38
TomWilgaWH
in reply to: tjmapper

Hey TJ,

I've been thinking aswell. Have you changed your zoom features? By that I mean can you only see certain things at certain zoom levels, or does everything open up at once and just fill the screen? I think you should try this since it helped me. It might be an issue with everyhting loading in at once. The database or the software may be getting overwhelmed with all of the information it has to display at once, that it just gives errors. I know for a fact that the system runs much better now, it feels a little more stable.

Let me know how you make out.
--------------------------------------------------
Thomas Wilga
Engineering Technician
GIS Coordinator
Field Inspector

Welland Hydro-Electric Systems Corp.
Message 30 of 38
Anonymous
in reply to: tjmapper


TJ what part of the South East and who is the
reseller?


 

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
Well
our GIS department has gone live with using the SDF format and we are still
getting this error. Everytime it comes up i just scurry over and ask them to
close it out then proceed to make a new drawing and save it in its place
before anyone notices. Not exactly what i had in mind for a great mapping
system. If its not 'Failed to describe Class" its "FDO preperation failed" or
"Failed to query" or disappearing water lines, or features being selected that
are outside a selection box. I am so glad i talked my supervisor into
converting to this. I really only hope it is because of my own negligence, but
i cant seem to find ANYONE in the southeast that knows anymore about this
stuff. Even our reseller is in the dark.
Message 31 of 38
tjmapper
in reply to: tjmapper

I do have Zoom levels on things like hydrants and valves (about 12000 together, viewable from about 1:15000), but to hide water mains from full zoom would not make sense. I have ended up creating 3 maps for each of our systems and it does seem to take much longer for the "failed to describe class" to come up, but what if i need something with everything on it? I have tried to condense a lot of the features into single SDF's as I was connecting to quite a few, but that did not seem to help...............Murph I am just West of Atlanta, don't really want to just throw the resellers name out. There are only 2 in the area.
Message 32 of 38
Anonymous
in reply to: tjmapper


If you're west of Atlanta then you're just on the
edge of another reseller than may be of use.

Can't make any promises and have not  kept up
on this thread but give me a holler if you want.

 

jhmATalacadDOTcom


 

 


style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
I
do have Zoom levels on things like hydrants and valves (about 12000 together,
viewable from about 1:15000), but to hide water mains from full zoom would not
make sense. I have ended up creating 3 maps for each of our systems and it
does seem to take much longer for the "failed to describe class" to come up,
but what if i need something with everything on it? I have tried to condense a
lot of the features into single SDF's as I was connecting to quite a few, but
that did not seem to help...............Murph I am just West of Atlanta, don't
really want to just throw the resellers name out. There are only 2 in the
area.
Message 33 of 38
tjmapper
in reply to: tjmapper

I might just take you up on that.

Trying to upgrade from map '08 to '09. Hopefully everything will go smoothly.
Message 34 of 38
TomWilgaWH
in reply to: tjmapper

Just a heads up. We upgraded to '09 and had the same issues, plus more. Not sure what it was, but I'm back to '08 and eventually going to Topobase '09. I guess we'll see how that goes.
--------------------------------------------------
Thomas Wilga
Engineering Technician
GIS Coordinator
Field Inspector

Welland Hydro-Electric Systems Corp.
Message 35 of 38
tjmapper
in reply to: tjmapper

Im currently working on a new topic for discussion about creating multipoint features. No other issues "YET". Cross your fingers for me.
Message 36 of 38
tjmapper
in reply to: tjmapper

double post.

sry
Message 37 of 38
tjmapper
in reply to: tjmapper

http://discussion.autodesk.com/forums/thread.jspa?threadID=699012
Message 38 of 38
tjmapper
in reply to: tjmapper

Just an Update.

I installed SQL 2008 Express, which is a free version, and bulk copied all my SDF and database data to it. I have refreshed, checked out/in, updated, saved, and purposely crashed dozens and dozens of times with none of the errors above.

It is huge to be able to fix this problem for only the cost of learning SQL.

Its now just a matter of getting it setup for multiple users.

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