Links Markups in a DWF file to the document. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2014 
Syntax
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Parameters
- file
 -  Type:  System String  
Full path of the file to link. File must exist and must be a valid DWF file. 
- options
 -  Type:  Autodesk.Revit.DB DWFImportOptions  
Various link options applicable to the DWF format. 
Return Value
A collection of link instance element ids created by the markup link.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | Not a valid file for DWF import (.dwf or.dwfx files are valid). -or- Some of the views is not importable. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions FileArgumentNotFoundException | The given file does not exist. | 
| Autodesk.Revit.Exceptions InvalidOperationException | Import is temporarily disabled. | 
| Autodesk.Revit.Exceptions 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. | 
| Autodesk.Revit.Exceptions ModificationOutsideTransactionException | The document has no open transaction. |