As I report in https://www.knowbrainer.com/forums/forum/messageview.cfm?catid=4&threadid=35599#187421

I have been able to  reproduce some problems related to an interaction between using of the DgnEngineControl interface, KnowBrainer, and a "mature" profile.  [*]  however, the problem does not occur

I have stripped down the speech command that uses DgnEngineControl  to what I think is the minimum correct use of such an interface:

Name: Test Control
Sub Main
Dim eng As New DgnEngineControl
eng.Register(0)
eng.UnRegister(False)
Set eng = Nothing
End Sub

For that matter, I have also tried stripping it down even further

Name: Test Control
Sub Main
Dim eng As New DgnEngineControl
eng.Register(0)
'eng.UnRegister(False)
'Set eng = Nothing
End Sub

It is remarkable how many minor variants of the above one sees on these forums. Sometimes no argument is passed to register, sometimes an argument is. Etc.   frequently people do not bother to un-register or clear the object. Occasionally people do not bother to register.

Q:  what is the  minimum correct connection to and disconnection from the DgnEngineControl interface?

...  in the interests of eliminating something simple like that as a possible cause of the issue reported in the link.

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Note *:  the problem only occurs when I  execute  a command using DgnEngineControl as above,  running KnowBrainer and Dragon, on a mature profile.  it does not occur when I am running Dragon without KnowBrainer.   it does not occur when I am running KnowBrainer and Dragon on a completely fresh profile.

The problem manifests itself as extremely slow times to open  a profile, frequently exceeding 5 to 7 minutes.  See  the link for more details:  https://www.knowbrainer.com/forums/forum/messageview.cfm?catid=4&threadid=35599#187421

DPG15.6 (also DPI 15.3) + KB, Sennheiser MB Pro 1 UC ML, BTD 800 dongle, Windows 10 Pro, MS Surface Book 3, Intel Core i7-1065G7 CPU @ 1.3/1.5GHz (4 cores, 8 logical, GPU=NVIDIA Quadro RTX 3000 with Max-Q Design.