i will email the install log files next day.
(The client has left already today and I am unable to get copies of the files.)

My HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\ODBCINST.INI\AdagioDataSourceDriveris is also set to : C:\SOFTRAK\ODBCV2\AdagioODBCv2.dll

and

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Softrak Systems\Adagio ODBC matches your entry with: C:\SOFTRAK\ODBCV2

Here is a question that perhaps I should have asked earlier:
Should the Adagio ODBC install be made to the server, or to each of the local workstations?
Note that all the other Adagio modules are installed from a workstation to the mapped k: drive on the client's server.