Install: Could not load file or assembly 'Infragistics4.Win.UltraWinEditors.v14.1'

Install: Could not load file or assembly 'Infragistics4.Win.UltraWinEditors.v14.1'

Issue / Problem:

Get the following error when starting Forecast 5 Verison 3:

This may be caused due to installing the incorrect version of Forecast 5 for your operating system. In this case 64-bit files were involved on a 32-bit only Windows installation.


  1. Uninstall Forecast 5.

  2. Delete the program folder, located under C:\Program Files\ (Or C:\Program Files (x86)).

  3. Download the latest release for your version of Windows from

  4. Reinstall the latest version of Forecast 5 (Ensure you run the installation as Administrator).

  5. Should be working.

  6. Please note this error has only occurred on Windows 7 32-bit to date. Please advise if other Operating Systems are being effected.