Can't seem to install WaterUtilityNetworkTools add-in

[JoshWhite]

Why can't I install the Water Utility Network Tools add-in?  Every time I do this I get an error that says "No GUI components found in this Add-in.  Add-in version does not match.  I am using 10.4.1 and this appears to be the most recent version of the add-in. 

[AllisonMuise1]

Josh White‌ did you figure this out? Could be that you have old version of other local government add-ins still installed, or could be that you didn't get the latest version of the add-in for some reason. The latest is available with the download from this page: Water Utility Network Editing and Analysis | ArcGIS for Water 

[JoshWhite]

Allison,

I just tried this with your link and got the same results.  I did a search for waterutility and I deleted everything that looked like an add-in except for the new one I just downloaded and that didn't help either.  It came from a file called UtilityNetworkEditingandAndAnalysisA4W.zip

[AllisonMuise1]

Josh White‌ This add-in shares files with other ArcGIS for Local Government add-ins including Attribute Assistant, the addressing tools, and possibly a few others. There may be a conflict if an old version of one of those is on the machine.

The correct procedure for removing add-ins is here: Remove add-ins - Water Utility Network Editing and Analysis | ArcGIS for Water 

[JoshWhite]

Nope didn't work, and now, my attribute assistant is gone and I can't add it back either.  I should add that I have never had to remove an old add-in before and have always been able to just upgrade as needed to the newest version without any hiccups.  Now I am unable to add any add-ins at all at 10.4.1.

[AllisonMuise1]

Hmmm...Something funny is definitely going on. What you are trying should work. I suggest contacting Support. They will be able to troubleshoot with you easier than I can through GeoNet.

-A

[MaureenKamau]

Hi Josh,

Have you tried the solution recommended in the below tech support article;

Error: No GUI components found in this Add-In. Add-In version does not match 

[JoshWhite]

Maureen,

That is a little more involved than what I want to do.  I don't have Visual Studio either.  I have opened a tech support ticket on it and they are working to help me.  Sounds like I may have to reinstall ArcGIS for Desktop, not my idea of a good time.

[JoshWhite]

As a follow up for those that may be following this thread:

Esri Support used the basic concepts found at Essential Python add-in concepts—Help | ArcGIS for Desktop 

They sent me the add-in in its raw form (an Esri AddIn File) and installed it on the back end (by placing it in the well-known folder location C:\Users\<username>\Documents\ArcGIS\AddIns.  I've asked if the Add-in Manager has had any bugs reported because that appears to be the case with this.  There could possibly be a registry error that has prevented it from working as well, that would have been the next step prior to doing the reinstall mentioned above.