E-Notebook Enterprise: 'CLASSNOTREG' error message when opening PDF sections

When opening a PDF Section in E-Notebook the following error is shown:
"Error Loading: Exception has been thrown by the target of an invocation. (Class not registered (Exception from HRESULT:0x80040154 (REGDB_E_CLASSNOTREG)))"

This error is seen when Adobe Acrobat is not installed in the client machine, or the version installed is not supported by E-Notebook. Older versions of E-Notebook Enterprise only support Adobe Acrobat 32-bits.

Solution: Install the correct Adobe Acrobat version for your product. You can refer to the E-Notebook Enterprise Hardware and Software Guide for the exact supported version.