We are transferring an old Unix app and get Terminal types not recognized. Exact message is 'tput: unknown terminal "WYSE50"'. Using man and other applications will say "WARNING: terminal is not fully functional"
Well, for starters, it is unusual to see TERM in upper case. In standard TERMINFO, it would be wyse50 and vt100, not caps. But you might not be using standard TERMINFO. For example, many old Cobol apps used their own terminal databases and a login script set it to point at a database somewhere other than in /user/lib. So if setting to "wyse50" and so on doesn't help entirely, that could be why - the database being pointed at may not exist. Also see my article on Termcap and Terminfo.
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Software engineering is the part of computer science which is too difficult for the computer scientist. (Friedrich Bauer)