Problem opening the .nhmodel file.

We have been using NHibernate Designer for some months but no we have a problem opening the model file. If we try to open the model Visual Studio only opens it as an xml document.

I tried to create a new empty one and that one i can open.

Running version 2.1.374.20597 (Nightly build from June 6) on Visual Studio 2020 Ultimate 10.0.40219.1 SP1Rel

Could you help us, (we don't want to upload the model here but we can send it by mail).

This can occur for a few reasons:

1. Visual Studio 2010 has an issue where it tends to remember if a file has ever in its existence been opened as XML, even due to an error, and if so keeps opening it as XML for ever and ever. To fix this, close the solution, open the .csproj or .vbproj in a text editor, find the element for the .nhmodel file, and remove the Designer subelement.

2. If Visual Studio encounters an error loading the designer, it prompts to disable integration (and then uses the XML editor). If you say yes to this, then VS doesn't give you a way to undo it once the error has been fixed. To re-enable the designer, open a Visual Studio command prompt (see below) and run devenv /resetskippkgs.

If this happens immediately on first installation, it may be a UAC issue. It seems that UAC can prevent Visual Studio integration from installing correctly (possibly due to registry virtualisation). Try uninstalling, turning UAC off temporarily, and then reinstalling.

Jeremy

Thanks, it worked.

Thou i think you meant .nhmodel instead of .lsmodel (for NHibernate Designer).

Daniel

I have the trial version of Microsoft Visual Studio Professional 2012 Version 11.0.50727.1 and the Mindscape NHibernate Model Designer Version 2.1.555.21807 I am facing the same issue as DanielHeden and tried the 2 solutions above. When i run devenv /resetskippkgs i'm getting this: http://i.snag.gy/U8Lfx.jpg UAC is disabled.

Any toughs? Thanks

Are you able to send us through your ActivityLog.xml file (which will be located in %APPDATA%\Microsoft\VisualStudio\11.0) as this should contain information about what is occurring. This will help us in suggesting what you can do to help resolve this.

Thanks!
Jeremy

Hi Jeremy,

Thanks for the quick response, here is my log: http://pastebin.com/KDCqDbp1

Thanks the log file does contain the information about what is going wrong.

The problem is that you dont appear to have any VS2010 installation present on the system. Currently we target the 10.0 (VS 2010) SDK bits to be compatible with both VS2010 and VS2012 with the single VSIX but this does mean even though you are only intending to use VS2012 you will need a Visual Studio 2010 "shell" installation at the minimum to provide the assemblies from the SDK which we depend on. e.g. installing the SQL 2012 client tools or an express edition of VS2010 should provide these.

Jeremy

Hi Jeremy,

Thank you for the explanation, this makes sense. I installed the Microsoft Visual Studio 2010 Express Version 10.0.30319.1 and after rebooting the NHibernate Designer works fluently in VS2012.

Many Thanks Jaws