This problem bit me again, so I am posting it here in case anyone else can benefit from it (me included, if I think to look for it.)

The problem is that CommandRobot.exe can't achieve it's goal for some reason, so it logs a failure to the C:\ProgramData\Nuance\NaturallySpeaking15\logs\me\dragon.log file every N milliseconds. My 25MB log file is filled with tens of thousands of the messages. 

I should know by now to delete the giant log file when Dragon performance gets terrible. Lindsay showed me how to delete the log file years ago. But it takes a while for the log to build up, so I don't always remember to do it.

I should write a software program to automatically delete/move the log file every time I boot my machine. 

Anyhow, here's an example of the log entries for anyone who is curious.

2022-02-26|16:46:04.653|  LEGACY| 8396|24488|I|(E:\work\1500relmob\natsdk\activex\vmenu.cpp,879) : m_pIBlankGrammar->Deactivate() returned unexpected value The RPC server is unavailable.

2022-02-26|16:46:04.653|  LEGACY| 8396|24488|I| (RPC_S_SERVER_UNAVAILABLE, 1722) (0x800706ba) in "CommandRobot.exe" process.

2022-02-26|16:46:04.653|  LEGACY| 8396|24488|I|    In ComCallFailed(), couldn't get the IDgnError.

2022-02-26|16:46:04.653|  LEGACY| 8396|24488|I|Exception thrown (E:\work\1500relmob\shared\comcalls.cpp, 132).

2022-02-26|16:46:04.746|  LEGACY| 8396|24488|I|Expected value 0x80040419.

2022-02-26|16:46:04.746|  LEGACY| 8396|24488|I|(E:\work\1500relmob\natsdk\activex\vmenu.cpp,879) : m_pIBlankGrammar->Deactivate() returned unexpected value The RPC server is unavailable.

2022-02-26|16:46:04.746|  LEGACY| 8396|24488|I| (RPC_S_SERVER_UNAVAILABLE, 1722) (0x800706ba) in "CommandRobot.exe" process.

2022-02-26|16:46:04.747|  LEGACY| 8396|24488|I|    In ComCallFailed(), couldn't get the IDgnError.

2022-02-26|16:46:04.747|  LEGACY| 8396|24488|I|Exception thrown (E:\work\1500relmob\shared\comcalls.cpp, 132).

2022-02-26|16:46:04.916|  LEGACY| 8396|24488|I|Expected value 0x80040419.

2022-02-26|16:46:04.916|  LEGACY| 8396|24488|I|(E:\work\1500relmob\natsdk\activex\vmenu.cpp,879) : m_pIBlankGrammar->Deactivate() returned unexpected value The RPC server is unavailable.

2022-02-26|16:46:04.916|  LEGACY| 8396|24488|I| (RPC_S_SERVER_UNAVAILABLE, 1722) (0x800706ba) in "CommandRobot.exe" process.

2022-02-26|16:46:04.916|  LEGACY| 8396|24488|I|    In ComCallFailed(), couldn't get the IDgnError.

2022-02-26|16:46:04.916|  LEGACY| 8396|24488|I|Exception thrown (E:\work\1500relmob\shared\comcalls.cpp, 132).

2022-02-26|16:46:05.186|  LEGACY| 8396|24488|I|Expected value 0x80040419.

2022-02-26|16:46:05.186|  LEGACY| 8396|24488|I|(E:\work\1500relmob\natsdk\activex\vmenu.cpp,879) : m_pIBlankGrammar->Deactivate() returned unexpected value The RPC server is unavailable.

2022-02-26|16:46:05.186|  LEGACY| 8396|24488|I| (RPC_S_SERVER_UNAVAILABLE, 1722) (0x800706ba) in "CommandRobot.exe" process.

2022-02-26|16:46:05.187|  LEGACY| 8396|24488|I|    In ComCallFailed(), couldn't get the IDgnError.

2022-02-26|16:46:05.187|  LEGACY| 8396|24488|I|Exception thrown (E:\work\1500relmob\shared\comcalls.cpp, 132).

2022-02-26|16:46:05.523|  LEGACY| 8396|24488|I|Expected value 0x80040419.

Win10/11/x64, AMD Ryzen 7 3700X/3950X, 64/128GB RAM, Dragon 15.3, SP 7 Standard, SpeechStart, Office 365, KB 2017, Dragon Capture, Samson Meteor USB Desk Mic, Amazon YUWAKAYI headset, Klim and JUKSTG earbuds with microphones, 3 BenQ 2560x1440 monitors, Microsoft Sculpt Keyboard and fat mouse

Like I said to you on the other thread Kevin I am happy to connect up and have a look at this to find out what is going on. You should not be getting 32 MB log files because of commandrobot and i would be most interested to find out why.

So can you send me this file for starters:

"C:\Users\YOUR WINDOWS USER NAME\AppData\Roaming\PCByVoice\PCByVoice SpeechStart\PCByVoice SpeechStart.log"