An error occurred during the installation of assembly

 Applies To 
 Product(s):RAM Modeler
 Environment: Windows 7
 Area: Installation
 Original Author:Jeremy Hoesly, Bentley Technical Support Group

Error or Warning Message

During installation, the following error occurs which when dismissed, rolls back the installation:

An error occurred during the installation of assembly 'Microsoft.VC80.ATL,type="win32",version="8.0.50727.762",publicKeyToken="1fc8b3b9a1e18e3b",processorArchitecture="amd64". Please refer to Help and Support for more information. HRESULT: 0x80070BC9.


Some Microsoft assemblies included with RAM Structural System are failing to install because a previous version of the assemblies could not be removed. Because of this, the RAM Structural System installation is canceled and rolled back.

How to Avoid

Removal of the older assemblies will resolve the problem. By default, Windows retains older versions of assemblies even when they are superceded by newer versions later. Windows provides a cleanup option to remove unused assemblies, however. To perform this cleanup, please perform the following steps:

  1. Select from the Windows Start menu:
    All Programs -> Accessories -> Systems Tools -> Disk Cleanup
  2. In the Disk Cleanup window that appears, click the "Clean up system files" button in the lower left corner.
  3. The Disk Cleanup window will reappear with additional choices. Place a checkmark next to Windows Update Cleanup.
  4. Finally, click the OK button to perform the cleanup operation.
  5. Once complete, attempt to install RAM Structural System again.

See Also

[[SELECTsupport TechNotes and FAQs]]