Creates an instance of a FailureDefinition. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0) 
  Since:  2011 
Syntax
| C# | 
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Parameters
- id
-  Type:  Autodesk.Revit.DB FailureDefinitionId  
 Unique identifier of the failure.
- severity
-  Type:  Autodesk.Revit.DB FailureSeverity  
 The severity of the failure. Cannot be FailureSeverity::None.
- messageString
-  Type:  System String  
 A user-visible string describing the failure.
Return Value
The created FailureDefinition instance.Remarks
 The newly created FailureDefinition will be added to the FailureDefinitionRegistry. Because FailureDefinition could only be registered when Revit starting up, this function cannot be used after Revit has already started. Throws InvalidOperationException if invoked after Revit start-up is completed. 
 Examples
 Copy  C#
 Copy  C# // define a new failure id for a warning about walls
FailureDefinitionId warnId = 
    new FailureDefinitionId(new Guid("FB4F5AF3-42BB-4371-B559-FB1648D5B4D1"));
// register the new warning using FailureDefinition
FailureDefinition failDef = FailureDefinition.CreateFailureDefinition(warnId, 
    FailureSeverity.Warning, 
    "Wall is too big (>100'). Performance problems may result."); Copy  VB.NET
 Copy  VB.NET ' define a new failure id for a warning about walls
Dim warnId As New FailureDefinitionId(New Guid("FB4F5AF3-42BB-4371-B559-FB1648D5B4D1"))
' register the new warning using FailureDefinition
Dim failDef As FailureDefinition = FailureDefinition.CreateFailureDefinition(warnId, FailureSeverity.Warning, "Wall is too big (>100'). Performance problems may result.")Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The id of failure definition is not valid. -or- The id of failure definition is already used to register another FailureDefinition. -or- The severity of failures cannot be FailureSeverity::None. -or- Message string is empty or contains invalid characters. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was null | 
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | A value passed for an enumeration argument is not a member of that enumeration |