Hi, nobody responded to my bug report, so I'll apparently have to fix it myself... :-) Testcase: on Windows (the fault won't show on Unix), open a Java file and create new JDE project in the same directory (make sure there are no other project files on the path towards the root - it isn't that they would mask the problem, but they might be destroyed when demonstrating it). Restart XEmacs, open the Java file again (JDE should notice the project file) and run jde-save-project . JDE keeps the prj.el buffer (it should save and close it after updating but doesn't), and the contents of the buffer are wrong. Analysis: in a couple of cases (it's quite possible that I didn't notice all of them), JDE needs to map a pathname to the project file to an (existing) buffer containing the file; it does it by checking the result of buffer-file-name on the items of buffer-list, with string=, *not* against the raw file name, but against a somewhat canonicalized string (in particular, a string having directories separated - even on Windows - by slashes) and naturally can't find the buffer... There should be a function for this task, which handles these irritating details - and apparently there is: get-file-buffer . So, I replaced the ad-hoc check by a call to get-file-buffer (in 2 places, where it seemed "clear" what's going on) and got the testcase to work. Possible follow-up: I wonder what JDE will do with mixed-case pathnames; I tried only all-lowercase... Overall, the Right Way would of course be to document what *exactly* functions (like jde-save-close-buffer) expect as a parameter, but I can't see myself bothering with that sort of thing - the included patch seems good enough... Bye Vasek --- jde.old-el Mon Nov 26 10:12:25 2001 +++ jde.el Mon Mar 4 16:50:28 2002 ＠＠ -1383,9 +1383,7 ＠＠ (defun jde-save-close-buffer (project) "Saves and closes the buffer associated with PROJECT." - (let* ((buffer (find-if (lambda (buf) - (string= project (buffer-file-name buf))) - (buffer-list))) + (let* ((buffer (get-file-buffer project)) (standard-output buffer)) (if buffer (progn ＠＠ -1404,9 +1402,7 ＠＠ (lambda (project) (if (and (not (string= (car project) "default")) (member (car project) projects)) - (let ((buffer (find-if (lambda (buf) - (string= (car project) (buffer-file-name buf))) - (buffer-list))) + (let ((buffer (get-file-buffer (car project))) standard-output) (if (null buffer) (setq standard-output (setq buffer (jde-save-open-buffer (car project)))) 2002-03-04 Vaclav Barta <vbar(a)comp.cz&gt; * jde.el: use get-file-buffer to map pathname to buffer