I doubt that the GUI would display a RELATIVE path like you used in the INFILE statement.
It will normally display an ABSOLUTE path that starts from the root node, / .
Try including the leading / in the path.
infile '/home/jacksonan19450/AptensioAdultboot/BOOTSTRAPAPTENSIO_ADULT/CONTROLPREP/REF.CTL' termstr=CRLF truncover;