Modbus Device Importer error 429: ActiveX component can't create object

Goals and Symptoms

Symptoms
When opening Modbus Device Importer, the following error is displayed:

"An unknown error occurred while trying to load the Modbus Device Importer. Error #: 429. ActiveX component can't create object."

Causes and Fixes

Resolution

Re-register the following ION E files:

\system\bin\imgx61.dll
\system\bin\ionsng.dll

e.g.
From the Windows command prompt, navigate to the system\bin\ folder, type: "regsvr32 imgx61.dll", ENTER