The reason for calculation failure. If the calculation fails, this message will be shown in an error, or warning if we are editing the constraints.

Namespace: Autodesk.Revit.DB.Structure
Assembly: RevitAPI (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0)
Since: 2018.1

Syntax

C#
`public string ErrorMessage { get; set; }`

Visual Basic
`Public Property ErrorMessage As String Get Set`

Visual C++
`public: property String^ ErrorMessage { String^ get (); void set (String^ value); }`

Exceptions

Exception	Condition
Autodesk.Revit.Exceptions ArgumentException	When setting this property: errorMessage is an empty string.
Autodesk.Revit.Exceptions ArgumentNullException	When setting this property: A non-optional argument was null