Fatal Error Message

[tultalk]

The IdThreadMgr unit was in Indy 8 and 9, but it does not exist in Indy 10 (it was replaced with the IdSchedulerOfThread unit and descendants).  The IdException unit still exists in Indy 10, though.  IIRC, Delphi 5 had Indy 8 pre-installed.  So you will have to update the project to use Indy 9 or 10 instead.

Chianged more errors

  SysUtils, Classes, extctrls, dialogs,
  IdSchedulerOfThread, IdThreadMgrDefault, IdBaseComponent, IdComponent,
  IdUDPServer, IdTCPServer, IdTCPClient, IdSocketHandle, IdGlobal,
  IdAntiFreezeBase, IdAntiFreeze, Math;

I had changed to Indy 10 from 9.

Error IdThread and red above highlighted

What else has changed?

Thanks

Robert