Building from top level or from within the package's directory gives the same result... cd /home/steve/programming/XEmacs/packages/xemacs-packages/xslide/ gmake xemacs -no-autoloads -vanilla -batch -eval '(setq stack-trace-on-error t load-always-display-messages t load-ignore-out-of-date-elc-files t load-show-full-path-in-messages t)' -l /home/steve/programming/XEmacs/packages/package-compile.el -- ispell mail-lib xemacs-base -- -l cus-face -l regexp-opt -l font-lock -l sendmail -l xslide-data -l xslide-abbrev -l xslide-font -l xslide-process -l xslide -f batch-byte-compile auto-autoloads.el Loading /usr/local/lib/xemacs-21.4.14/lisp/auto-autoloads... Loading /home/steve/programming/XEmacs/packages/xemacs-packages/xemacs-base/auto-autoloads... Loading /home/steve/programming/XEmacs/packages/xemacs-packages/mail-lib/auto-autoloads... Loading /home/steve/programming/XEmacs/packages/xemacs-packages/ispell/auto-autoloads... # bind ( stack-trace-on-signal debug-on-signal stack-trace-on-error debug-on-error) signal(error ("Stack overflow in regexp matcher")) # bind (data error-symbol) signal-error(error ("Stack overflow in regexp matcher")) # bind (error-data) normal-top-level() # (condition-case ... . error) # (catch top-level ...) Stack overflow in regexp matcher xemacs exiting . gmake: *** [auto-autoloads.elc] Error 255 Compilation exited abnormally with code 2 at Fri Nov 28 14:36:11 -- |---<Steve Youngs>---------------<GnuPG KeyID: A94B3003>---| | XEmacs - The only _______ you'll ever need. | | Fill in the blank, yes, it's THAT good! | |------------------------------&lt;sryoungs(a)bigpond.net.au&gt;---|