Debug mode

[abajenov]

Can anybody help me. I am new to API and decided to use debug mode for better understanding of my code. However, every debugging session launches a new instance of Revit. Is there any way to debug file that is already opened? And maybe somebody know, how to pin variables forever. They disappear when I stop debugging. Google didn't help me with that. Thank you in advance and have a nice day!

[jeremy_tammik · Accepted solution]

Yes, there are several ways to debug in an existing Revit session. One way is to 'attach to process':

• https://duckduckgo.com/?q=visual+studio+attach+to+process+debug

You can also launch Revit.exe inside the Visual Studio debugger and then use the 'hot reload' feature to update you code when you make a modification:

• https://thebuildingcoder.typepad.com/blog/2021/10/localised-forge-intros-and-apply-code-changes.html...
• https://thebuildingcoder.typepad.com/blog/2024/02/net-core-c4r-views-and-interactive-hot-reload.html...

The Building Coder lists more possibilities for Edit and Continue, Debug without Restart, Live Development:

• https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.49