"System.ArgumentNullException" message while starting Dynamo from Revit

Autodesk Support

Oct 8, 2023


Products and versions covered


Issue:

Dynamo cannot be started from Revit, the following message will be displayed:

"System.ArgumentNullException [...]"

SystemNullException.png

Causes:

An outdated version of ADPClientService is installed on the machine.

Solution:

Follow the steps to check and update the ADPClientService version:

1. Go to folder - C:\Program Files\Autodesk\AdODIS\V1\Setup - and locate ADPClientService.exe
2. Right-click on ADPClientService.exe.
3. Select Properties -> Details tab and check the File Version. Ensure that the version of ADPClientService.exe is either 4.1.38 or higher. 
Step1.png
4. Download the latest binaries from the attachments to install them.
5. Double-click to launch the ADPClientSerivce.exe. A console window will appear for a few seconds and close itself. If it does not close say after 10-15 seconds, close it manually.

Notes:

  • On following the above steps, the ADPClientSerivce.exe will copy itself to the user folder (%appdata%\Autodesk\ADPSDK\bin) along with its dependencies. After which, any product using this service will be using the latest ADPClientSerivce binaries from this location. 
  • Admin privileges may be required to install the latest binaries of AdODIS.

Attachments:

AdODIS-installer.exe;

Products:

Revit Product Family; Dynamo;

Versions:

2021;


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