Chem BioDraw Ultra

  • Operating Systems:  Windows, Mac OS X (not all functionality available on Mac version)
  • Users:  Department of Chemistry and Physics Faculty, Staff, and Students
  • Download Now

Faculty Staff and Students who are authorized users may download their copy of Chem Ultra by following the link below and agreeing to CambridgeSoft's license agreement. Please note not all functionality is available on the Mac OSX version. Cambridgesoft has stopped developing - Chem 3D specifically.

Individual Login

Individual users can download the software via this link:

New to version 10.0 and newer software is Activation. Activation will be required for individuals who choose to install the software for home, office or personal user.

Bugs, Problems and Solutions
  1. Where can I find my serial number?

    You can go to the URL above, enter your email address, and click submit. If you have entered a valid or address you will be redirected to the software download page. In addition an email will be sent to the email address user above with your product information. If you encounter problems please email

  2. Users receive the following error when trying to install:
    Error 2738.

    Error 2738. Could not access VBscript run time for custom action

    The information in this article applies to: All versions of Windows Vista.

    When installing or uninstalling the following error message is displayed: Error 2738. Could not access VBScript run time for custom action.

    This error message indicates that the VBScript engine is not currently registered on the machine where the install/uninstall is taking place.

    The VBScript engine can be quickly registered by following this process:

  1. Run Command Prompt as administrator
  2. Start Menu -> All Programs -> Accessories
  3. Right click on Command Prompt and select Run as administrator
  4. cd %windir%\system32
  5. regsvr32 vbscript.dll