Bitvise WinSSHD request “dumb” PTY problem

I’ve found the following scenario when testing SSH shell with the Bitvise WinSSHD server. If a request for a “dumb” pseudo-terminal is sent via the Chilkat SSH component’s SendReqPty method, the WinSSHD server responds with a success status, however, it really fails. The SSHD log has the following error message:

000000000116 2008-11-19 16:29:41.185Z WinSSHD 5.01 [297] Warning
  Session thread 1014 for Windows account 'DOTNET\test123' from 192.168.1.104:2513:
  Session channel 1: Error initializing terminal 'dumb': Loading terminfo file failed, call stack:

  - CreateFile() failed: Windows error 2: The system cannot find the file specified.
  - TermInfo::Load(): failed at opening file

000000000117 2008-11-19 16:29:41.388Z WinSSHD 5.01 [050] Info
  Session thread 1014 for Windows account 'DOTNET\test123' from 192.168.1.104:2513:
  Session channel 1: Closing session channel. 

The session channel is closed and all subsequent attempts at communication on the channel will fail.