Dyno Error - External Tools - Wrong Full Class Name

I’m using Dyno browser to display Dynamo graphs in the command ribbon. Some of my graphs run, however I get the below error for others. The graph I was attempting to run was named “Assembly Manager”.


My buttons.txt file:

“Dyno”: [“Highlight”, “Reset”, “Assembly Manager”]

Has anyone encountered this problem before or does anyone have a fix?


Please, send me these scripts and DPR files if you have it


please send me also your buttons file and verify file encoding. Proper encoding is UTF-8

Thanks Aleksey.

See attached buttons.txt file

buttons.txt (120 Bytes)


your script starts fine via button on my machine.

let me know if this error will be showed any time (after revit restarting or machine restarting)

Stupid question, a year later, but do you have dyno studio installed as well? trying to implement an inhouse toolbar I noticed that if you had only dyno installed, it would not work properly. You might need dyno studio as well.

I have the same error, not sure if @Aleksey_Lobanov could help me out,


I have just received the same error. Never had it before. Any thoughts welcomed.