A colleague is using a new Mac laptop, with OSX, for UNIX programming and
has created a data file, which appears to be in the form required by an
application which I built from an FB II source program.  This
application looks for a TEXT data file, but the UNIX data file does not
show up in its window of files to be opened. If the cause and solution of
this problem are simple and well-known, I would appreciate the
information.  Otherwise, I will go away and try to define the problem more
closely.

Vic Maslen