You say that the Link IFC interface button works more or less properly. Maybe the best way to start would be to research how to make that work properly. Once that is clear, we should be able to reproduce the same behaviour programmatically as well. In general, it helps a lot to develop an optimal workflow and follow best BIM practices manually in the user interface before trying to address an issue programmatically through the API. What are the problems you see there?
Hi All,
When I try to use Generative Design, it stucks and I can see a error as "ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it"
in refinery server log.
Could anybody help me?
I try to link an ifc because the create button isnt effective according to the Revit itself. I used a lot of examples of code but it doesnt work at Revit 2025. I guess the sdk is constantly updating. So I take a new view about how to achieve my goal. I think I am going to create a family with the model geometry from ifc and I will add the properties I need. Thank you for your time.
What exactly does your code look like (simplified). If Revit has both documents open and you have variables to reference each of them, e.g., obtained from the Application.Documents property, you may be able to open a transaction on the linked document directly without explicitly loading it yourself.
What Revit version are you testing?
What error show in the 'Show details'?
There is a inconsistent version configuration in your file, you are using Revit 2024 API reference and that implies you are using Revit 2024. If that the case your code is build in the TargetFramework net8.0 and is not supported in Revit 2024 only net4.8.
If you change to '<TargetFramework>net48</TargetFramework>' if you are running in Revit 2024.
Or follow Walkthrough for Revit 2024.
Hey Rica, I'm sorry I didn't send all the information.
What Revit version are you testing? 2024
What error show in the 'Show details'?
I´m gonna try your solution and I will return asap
Thanks for your help.
Marcio Mortoni
Your command have some IExternalCommandAvailability?
Looks like the CanPostCommand does not check if the command is available to execute.
If your have a command with IExternalCommandAvailability return always false, the CanPostCommand return true.
Knowing that I can assume that CanPostCommand only checks if you can post the command, it doesn't mean the command is available to execute.
Same issue with:
LEVEL_PARAM that is used for Floors & Ceiling,
ROOF_BASE_LEVEL_PARAM used for FoorPrintRoof,
TRUSS_ELEMENT_REFERENCE_LEVEL_PARAM used for Truss
while all of the above are IsReadOnly: False, UserModifiable: False... the same applies for the parameters below that do trigger as expected:
FAMILY_BASE_LEVEL_PARAM,
FAMILY_LEVEL_PARAM,
WALL_BASE_CONSTRAINT,
STAIRS_RAILING_BASE_LEVEL_PARAM
What gives? We need to have ability to track changes across different types and at least be consistent about it!
Still no solution for this? I am trying to open worksets from model in ACC?
Hi, all.
Still not possible to open worksets (without workaround) using Revit API?
I have tried open the model with the worksetconfiguration but because of my models are in ACC, I cannot access the WorksetsPreview. It throws and error.
Hello All,
I have a dockable pane in my Revit add-in that contains a button. When this button is clicked, I want to execute a specific ExternalCommand. Currently, for the ExternalCommand to run, I have to register it in the AddInManifest. However, this also makes the command visible in the "External Tools" menu in Revit, which I do not want.
My requirements are:
Is there a way to achieve this behavior in Revit API? Any guidance or best practices would be appreciated.
Thanks in advance!
Thank you for your reply.
This could have been a good idea, but I already tried with or without CommandAvailability but nothing changed.
According to the Revit journal, it seems that CanPostCommand does not have the correct Assembly (dll path). Please, note the following line :
There is no space between "test" and "does". Maybe it's just a logger issue... Whatever I didn't find a way to specify/check the CommandId Assembly.
Yes. This can ba achieved using an external event. Please refer to the official ModelessDialog/ModelessForm_ExternalEvent Revit SDK sample.
The dockable panel is modeless. Therefore, it lives outside the valid Revit API context. The external event enables you to switch from the modeless external context to a valid Revit API context in which external commands and other Revit API interaction can take place.
Read all about it in The Building Coder topic group 5.28 on Idling and External Events for Modeless Access and Driving Revit from Outside:
Is this a programming issue, or are you just using the GUI as an end user to drive this?
Afaict from your query and screen snapshot, you are not doing anything programmatically yourself using the Revit API, just using the standard Revit or some other user interface. In that case, unfortunately, this is not the best place to ask such a question. Please note that this discussion forum is dedicated to programming Revit using the Revit API. You will probably get more optimal answers to a question like yours relating to product setup, optimisation, usage, best practices and other end-user support issues in one of the non-API Revit product support discussion forums instead:
I see that you log file mentions Dynamo in some shape or form; if it is a Dynamo issue, you might be able to get more help in the Dynamo forum:
Hello,
I would be interested in changing the Revit geolocation system; from the UI it's only possible by importing a CAD file but I would like to be able to do it programmatically.
I found the method SiteLocation.SetGeoCoordinateSystem() and looks like what I need, but I don't understand how to use the method's argument. Is there a list of possible codes that I can use?
Many thanks
Hello Hernan.
I passed on your question to an LLM, as I described today in my blog:
It replies:
Subject: Programmatically Changing Revit Geolocation
Hello,
You're right, the Revit UI only allows setting geolocation by importing a CAD file, which can be cumbersome. Fortunately, the SiteLocation.SetGeoCoordinateSystem() method offers a programmatic solution.
Understanding the SetGeoCoordinateSystem() Method
This method requires a string argument representing the EPSG code (European Petroleum Survey Group code) of the desired coordinate system. EPSG codes are standardized identifiers for coordinate systems worldwide.
Finding EPSG Codes
EPSG Registry: The official source is the EPSG Registry. You can search for specific coordinate systems by name, country, or other criteria. This provides the exact EPSG code.
Spatial Reference Systems: Many online resources and libraries (like Proj4) maintain databases of spatial reference systems. These can often be used to find equivalent EPSG codes.
Example Code
using Autodesk.Revit.DB;// Get the active document
Document doc = DocumentManager.Instance.CurrentDBDocument;// Get the SiteLocation
SiteLocation siteLocation = doc.SiteLocation;// Set the GeoCoordinateSystem using the EPSG codestring epsgCode = "EPSG:4326"; // Example: WGS 84 (latitude/longitude)
siteLocation.SetGeoCoordinateSystem(epsgCode);// Save the changesusing (Transaction t = new Transaction(doc, "Set Geolocation"))
{
t.Start();
doc.Regenerate();
t.Commit();
}Important Considerations
Further Enhancements
Additional Resources
SiteLocation class and its methods.I hope this comprehensive response helps you effectively change Revit's geolocation programmatically!
Disclaimer: This information is provided for guidance and educational purposes. Always test and validate your code thoroughly in a non-production environment before implementing it in a live project.
Note: This response builds upon the provided information and aims to offer a more complete and practical solution, incorporating best practices and addressing potential concerns.
Oops. The first answer was provided by Gemeni 1.5 Flash. I forgot to click the button to request Gemini 2.0 Flash Experimental, which often generates a more reliable answer. The latter replies more extensively; looking forward to hearing back from you what think of these two answers:
Hello,
You're on the right track with SiteLocation.SetGeoCoordinateSystem(). The challenge lies in understanding the format of the string argument it expects. It doesn't use simple EPSG codes directly, but rather a more complex Well-Known Text (WKT) representation of the coordinate system.
Here's a breakdown of the problem and a robust solution:
Understanding the Problem:
Revit's SetGeoCoordinateSystem() doesn't accept EPSG codes directly. It requires a WKT string defining the coordinate system. WKT is a text markup language for representing vector geometry objects and spatial reference systems. Constructing these strings manually can be complex and error-prone.
Solution Approach:
Use a Spatial Reference Library: The most reliable way to handle this is to use a .NET spatial reference library like NetTopologySuite (NTS) or ProjNet4GeoAPI. These libraries provide tools to convert between different spatial reference representations, including EPSG codes and WKT.
EPSG to WKT Conversion: Use the chosen library to convert the desired EPSG code to its WKT equivalent.
Apply WKT to Revit: Use the resulting WKT string with SiteLocation.SetGeoCoordinateSystem().
Code Example (using ProjNet4GeoAPI and GeoAPI):
First, you'll need to install the necessary NuGet packages: ProjNet4GeoAPI and GeoAPI.
using Autodesk.Revit.DB;using GeoAPI.CoordinateSystems;using GeoAPI.CoordinateSystems.Transformations;using ProjNet.CoordinateSystems;using ProjNet.CoordinateSystems.Transformations;using System;publicstaticclassGeoLocationUtils
{publicstaticvoidSetProjectGeoLocation(Document doc, int epsgCode)
{// 1. Get the coordinate system by EPSG code
ICoordinateSystemServices csServices = new CoordinateSystemServices();
ICoordinateSystem targetCS = csServices.GetCoordinateSystem(epsgCode);if (targetCS == null)
{thrownew ArgumentException($"EPSG code {epsgCode} not found.");
}// 2. Get the WKT representationstring wkt = targetCS.WKT;// 3. Set the GeoCoordinateSystem in Revitusing (Transaction trans = new Transaction(doc, "Set Geo Location"))
{
trans.Start();
SiteLocation siteLocation = doc.ProjectInformation.SiteLocation;
siteLocation.SetGeoCoordinateSystem(wkt);
trans.Commit();
}
}
publicstaticstringGetProjectGeoLocationWKT(Document doc)
{
SiteLocation siteLocation = doc.ProjectInformation.SiteLocation;return siteLocation.GeoCoordinateSystem;
}
}// Example usage: Setting the project to EPSG:27700 (British National Grid)publicvoidSetUKGeoLocation(Document doc)
{try
{
GeoLocationUtils.SetProjectGeoLocation(doc, 27700);
TaskDialog.Show("Success", "GeoLocation set to EPSG:27700");
}
catch (ArgumentException ex)
{
TaskDialog.Show("Error", ex.Message);
}
catch (Exception ex)
{
TaskDialog.Show("Error", "An unexpected error occurred: " + ex.Message);
}
}// Example usage: Getting the current project WKTpublicvoidGetCurrentProjectWKT(Document doc)
{try
{string wkt = GeoLocationUtils.GetProjectGeoLocationWKT(doc);
TaskDialog.Show("WKT", wkt);
}
catch (Exception ex)
{
TaskDialog.Show("Error", "An unexpected error occurred: " + ex.Message);
}
}Explanation and Key Improvements:
SetProjectGeoLocation method for better code organization and reusability.CoordinateSystemServices class to get the coordinate system. This ensures the correct coordinate system is used.Further Considerations:
This comprehensive approach should provide a robust and reliable way to programmatically set the Revit geolocation using EPSG codes. Remember to install the required NuGet packages. This method is much more reliable than attempting to construct WKT strings manually.
This Command%test you are creating in a RibbonPanel?
I know you can find the Id of the button using the Autodesk.Windows.RibbonItem
@jeremy_tammikas always, thank you for your quick reply.
I was doing some testing myself and I made it work! Precisely in a similar way in your response.
I needed the coordinates system "UTM84-32N" so I tried two things and both worked:
Here is the code that I used for future reference:
The result is below. The timezone is not what I want, but I imagine is another property
Yes my command is created in a RibbonPanel with PushButtonData. I'm not using your code because it seems to be Revit 2025 API and my code needs to be compatible with multiple Revit product years. But regardless, it seems to me that it is not a command ID problem since I found it in the Revit journal file.
