|  Mechanical  | 
 Creates a new type of a mechanical equipment set and adds it to the document. 
 Namespace: Autodesk.Revit.DB.Mechanical
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
 Syntax
 Syntax   Exceptions
 Exceptions  | Exception | Condition | 
|---|---|
| ArgumentException | name cannot include prohibited characters, such as "{, }, [, ], |, ;, less-than sign, greater-than sign, ?, `, ~". -or- name is an empty string. -or- The given name is not unique | 
| ArgumentNullException | A non-optional argument was null | 
| InvalidOperationException | The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements). | 
| ModificationForbiddenException | The document is in failure mode: an operation has failed, and Revit requires the user to either cancel the operation or fix the problem (usually by deleting certain elements). -or- The document is being loaded, or is in the midst of another sensitive process. | 
| ModificationOutsideTransactionException | The document has no open transaction. | 
 See Also
 See Also