Object reference not set.. when StartTransaction()

[alain.holloway]

Hi there

I'm receiving a NullReferenceException when I am calling StartTrasaction() from the active document database transaction manager.

Why?

Thank you

Using the 2018 ObjectARX in Visual Studio Enterprise 2019 .NET Framework 4.7.2

[_gile · Accepted solution]

You should show the related code, so that we can see the context this exception occurs (CommandMethod, IExtensionApplication.Initalize, ...)

[alain.holloway]

Thank you Gile,

I've figure out that I already had a opened transaction.