Revit 2019 – Slow performance when selecting the File Tab

A very quick tip for a very annoying issue. Sometimes, when you delete or move Revit models the recent files list still looks for these missing references. This has an impact when you click the File Tab (can take minutes!) to open.

A quick fix is to delete these file paths from the Revit.ini file. The Revit ini file can be found the following folder (replace your user name shown in red):

C:\Users\YourUserName\AppData\Roaming\Autodesk\Revit\Autodesk Revit 2019

Open the Revit.ini file in notepad and remove the recent files (shown with the Red box). Click the Save command and the Revit.ini file will be updated.

Revit 2019 ini file

Restart Revit and the slow File Tab should be much quicker!



Dynamo – Geometry Working Range

A recent small change in Dynamo was an error when geometry exceeds a certain size. The default working range is small (when working in millimetres) and will often produce an error with most Revit models.

Dynamo is unitless and when working in feet and inches the default setting would allow the user to model something up to 10,000 inches (254 meters)! However, in millimetres this is only 10 meters which can very easily be exceeded. In the image below, you can see the error.

Error with Dynamo Point

The answer is to set the Geometry Working Range from the settings menu in Dynamo.

Dynamo - Geometry Working Range

The working ranges are as follows:

Dynamo Working Range

Dynamo does have some useful visualisation tools for Work Planes and Coordinate Systems but these cannot currently be scaled and, as such, only show with small geometry.

Dynamo Work Plane and Coordinate System

Hope this helps,


Revit and Dynamo – Finding the Centroid (CoG) of Revit elements

I was recently asked by a contractor if Revit could report on the centroid of selected objects to facilitate crane lifts. For those of you that know Revit well the answer if normally no. However, Dynamo is really useful for this sort of task. I have created a simple family to represent the Centroid and added three shared parameters to report on the X,Y and Z coordinates.


As you can see from the above Dynamo graph the method is fairly simple and can be really useful for a number of scenarios in construction planning.

Here is a quick video showing the use of the Dynamo Graph.


Autodesk Revit to Autodesk Robot Structural Analysis – Send Options

Happy New Year and look forward to all the good things planned for 2017! A few Autodesk Revit Releases back (Revit Structure 2015), Autodesk made a change to the integration with Autodesk Robot Structural Analysis to allow the transfer of data via an Intermediate .smxx file (Structural Binary file for transfer). Whilst this new format offers some benefits, the older method did have a few additional features that have not been incorporated within the .smxx export.revit-to-robot

The most useful of these were around offsetting structural members and the use of System panels and mullions.

Here is the process of transferring offsets in Revit to offsets in Autodesk Robot Structural Analysis. The beams have a z Offset Value of -50 set in the Properties Palette.


When the model is ready to be transferred to Robot Structural Analysis, hold down the Ctrl Key whilst clicking the Robot Structural Analysis Link command. You can then click the Send Options and select the ‘Use drawing model offsets as analytical’ check box.


Here is the result in Robot Structural Analysis.


Some of these legacy features can be useful so the Ctrl Key can revert back to the legacy method. Please be aware that results cannot be transferred to Revit using the ‘old’ method.

Hope this helps,