PRJ98: Error Accessing BuiltInDocumentProperties or CustomDocumentProperties (185885)

SYMPTOMS

When you attempt to use Automation to programmatically reference either the BuiltInDocumentProperties or CustomDocumentProperties collections in Microsoft Project 98, you may receive one or more of the following errors:

Run-time error 13
Type Mismatch

Run-time error '-2147319779 (8002801d)'
Automation Error

Run-time error '-2147319779 (8002801d)'
Automation Error
"Library not registered"

CAUSE

These errors occur when you attempt to use early binding. Early binding occurs when you declare a variable as an application-defined object type, for example:

   Dim prjobj as MSProject.Application

Microsoft Project 98 does not support accessing either CustomDocumentProperties or BuiltInDocumentProperties using early binding.

RESOLUTION

To work around this problem, use either of the following methods.

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Method 1: Use Late Binding

Do not use early binding to reference the Application object; use late binding instead. Late binding occurs when you declare a variable as an object rather than as an application, for example:

   Dim prjobj as Object
   Set prjobj = CreateObject("MSProject.Application ")

Method 2: Use a Second Object Variable

Use a second object variable to specifically handle only the BuiltInDocumentProperties and CustomDocumentProperties references. You can set this variable using the GetObject function, for example:

   Dim prjobj As MSProject.Application  'For early binding
   Dim prjobj2 As Object                'For late binding

   'Create the Project Object.
   Set prjobj = CreateObject("MSProject.Application")

   'Get the second object with GetObject call
   Set prjobj 2 = GetObject("c:\test.mpp")