Commented Unassigned: Application.GetActiveInstance throws ArgumentException "component" [20548]

From stack trace:
"System.ArgumentException was caught
HResult=-2147024809
Message=component
Source=System
StackTrace:
at System.ComponentModel.TypeDescriptor.GetDescriptor(Object component, Boolean noCustomTypeDesc)
at System.ComponentModel.TypeDescriptor.GetClassName(Object component)
at NetOffice.RunningObjectTable.GetActiveProxyFromROT(String componentName, String className, Boolean throwOnError)
at NetOffice.ExcelApi.Application.GetActiveInstance()
at ITSR2.Bricks.Excel.ExcelApp.GetRunningInstance()
InnerException: "
Do you have an ideas about possible reason and how to solve it?
Comments: ** Comment from web user: Riffer **

I have the same problem with a system running Windows 7 64bit- the admin just recently uninstalled a 32bit version of MS Office 2010 and installed a 64bit edition of MS Office 2010. My application manipulates Excel Sheets using NetOffice from an external application not an addon.

While Excel is running in RAM all goes right (including all functionalities) but when it is not running actually I get the exact same exception as in this issue mentioned.

My best guess is to just ignore this specific exception but I would like to have this solved in a more valid way.