Licese Manager initialization failed with error -200

I found a tool that could help testing if there is an incompatibility between two Revit plugins, it’s free and open source.

It allows you to disable all but one plugin easily and test if it works.
If it works alone then you can enable more plugins and test again until found if two plugins are not compatible.

To download and install please follow instructions found here:

  1. Download the tool from Bitbucket here.
  2. Find where you downloaded the zip file and unzip it.
  3. When unzipped, there will be a BIN folder; browse into the BIN folder then the Debug sub-folder.
  4. Run the tool by double-clicking on the exe file.
  5. In the window that opens, pick your version of Revit (or go with all if you like).
  6. The data grid will update to display all of the machine wide and the logged in user specific add-ins installed. You can pick and choose, invert, select all, then simply click on the “Enable/Disable” button to either enable or disable the selected add-ins.
  7. Once you’ve made your choices, start Revit in the normal manner. Simple and easy.

Or download it from here.

Got it to work… Thank you.

It was a conflict with a content management add-in called Avail (version, we’ve had a problem with this Add-in conflicting with Dynamo in the past.

I’ve manually disabled my user-land plugins but didn’t expect a conflict with system ones. Once IT gave the access needed to work with those it was simple. I’ll submit a dump with just the RiR and avail plug in through the link you’ve provided me previously - hopefully it helps in figuring out what that are doing that RiR doesn’t like.

Thank you for your help through this process.

Karl -

Yesterday we released a new Rhino 7 WIP that may avoid this conflict. Please update your Rhino 7 to the latest and see if you can run all the plugins. Look forward to hearing if it fixes this JSON conflict.