Hi Yutaka,
Thanks for the quick reply.
other 1. I reproduced this issue only if you select “COBOL (*.cob)” (or any configuration other than “All Files (*.*)”) in the “Save as Type” drop-down list. Next time, please select “All Files (*.*)” in the Save As dialog box, and you should see “.COB” as you expected.
That does the trick. Thanks a lot. :-D