topic Re: Error: Class not registered in ArcGIS Enterprise Questions

Error: Class not registered

Anonymous User — Fri, 07 Mar 2014 18:52:23 GMT

Original User: MCline19

I am trying to connect to an ArcGIS web server (user connection). I have connected multiple machines using ArcDesktop 9.3, 10.0 and 10.1 without any problems. But I have 1 computer (ArcDesktop 9.3) that returns an error stating "Class not registered". I cannot find a reason or possible fix for the issue.

Does anyone out there have any ideas why this might be happening and what a possible fix may be?

Thanks!

Re: Error: Class not registered

Anonymous User — Sun, 09 Mar 2014 17:29:03 GMT

Original User: crafty762

Are you using ArcFM at your organization? I've seen this type of error before and, in my experience, it has been related to the absence of a required ArcFM GUID within the registry for the particular version of ArcGIS and ArcFM being used. If you are using ArcFM, which specific product do you have installed on that 1 machine and which version of the software are you using?

Re: Error: Class not registered

NidhinKarthikeyan — Mon, 10 Mar 2014 08:23:57 GMT

To further add on to what William said,

COM components (ArcFM) are the possible culprits. There might be a dll that is needed but is not registered on your machine.

Re: Error: Class not registered

Anonymous User — Mon, 10 Mar 2014 14:03:49 GMT

Original User: MCline19

We don't use ArcFM anywhere within our organization.

nidhinkn, the dll issue you mention - Is that ArcFM related? Or is that still a possible culprit since we do not use ArcFM?

Re: Error: Class not registered

NidhinKarthikeyan — Mon, 10 Mar 2014 15:32:36 GMT

Since you don�??t use ArcFM, the dll issue is not related to it. I had encountered error when ArcFM was installed and trying to remove Class Extension. Also had issues while trying to access Geodatabase from third party, which was created using ArcFM, and had to delete custom COM objects from the Geodatabase to use the data.

Re: Error: Class not registered

NidhinKarthikeyan — Mon, 10 Mar 2014 15:43:52 GMT

From Web Help:

http://help.arcgis.com/en/arcgisserver/10.0/help/arcgis_server_dotnet_help/index.html#//0093000000m7000000

The probable cause of this error is that a machine you are trying to add as a SOC host does not have the SOC component of ArcGIS Server installed. To correctly configure the SOC machine, install the SOC software and run the postinstallation, ensuring that the SOM and SOC accounts have the same names and passwords as they do on the other machines in your configuration. Then log out and back in to the machine.

Not sure whether this is specific to the issue you are facing.

Re: Error: Class not registered

Anonymous User — Mon, 10 Mar 2014 15:44:07 GMT

Original User: crafty762

Are you absolutely sure that ArcFM never existed on that 1 machine? From that machine, if you launch C:\Program Files\ArcGIS\bin\categories.exe, scroll through the list of COM categories to see if there are any M&M entries.

Re: Error: Class not registered

Anonymous User — Mon, 10 Mar 2014 19:15:33 GMT

Original User: MCline19

I am sure ArcFM has never been installed on the machine. Also, checked C:\Program Files\ArcGIS\bin\categories.exe and did not find any M&M entries.

Re: Error: Class not registered

Anonymous User — Tue, 11 Mar 2014 14:20:08 GMT

Original User: MCline19

Do you think a reinstall of ArcDesktop is a possible solution?

Re: Error: Class not registered

NidhinKarthikeyan — Wed, 12 Mar 2014 04:55:04 GMT

Give it a try and if it doesn't help, then you have to contact Tech Support.