Looking for files on a case-sensitive file system (like
on Unix systems) may pose unexpected results, if
external stored Rexx programs cannot be found because
the case of the filename is not all in uppercase and as
a result the program stops with file not found errors
(while the same program works on other platforms).
If there is a possibility to still search for external
Rexx programs in a case-insensitive way even on a
case-sensitive FS, then that would be preferrable.
But what ooRexx could do in any case is the following:
first try to find the external file with the extensions
it tries out appended first in lower- and then in
uppercase, and if not found, try to find the external
Rexx files with all in lowercase (entire filename,
including the extension).