Whenever resolving a (relative) path to an absolute path with
'findDataFile', check if the result is empty and report original
(relative) path as missing. Otherwise no or a meaningless message is
issued ("File '' not found.").
Whenever resolving a (relative) path to an absolute path with
'findDataFile', check if the result is empty and report original
(relative) path as missing. Otherwise no or a meaningless message is
issued ("File '' not found.").