You can cancel an analysis in progress, using either of the following ways.
To cancel the analysis from Revit:
The most recent analysis message displays at the top.
In the message, the status of the analysis changes first to canceling, and then to canceled.
To cancel the analysis from the Autodesk® 360 Structural Analysis website:
The Model page opens and displays all performed analyses in your model.
The analysis is deleted from the list.