A few points:

  • The ODBC Driver 17 for SQL Server is indeed the latest version from Microsoft and is supported with DataFlex 19.1 and the 6.3 SQL Server Drivers from us.
  • There are two installers for ODBC Driver 17 for SQL Server (x64 and x86) - are you getting the same error with both?
  • Though your intent is to install from a shared drive to each workstation, have you tried copying to one and installing from there? This is just to see if something about the shared drive is at play.