Debugger entered--Lisp error: (file-error "Opening input file" "No such file or directory" "/home/oub/News/agent/lib/categories")
  insert-file-contents-internal("~/News/agent/lib/categories" nil nil nil nil raw-text used-codesys)
  byte-code("..." [buffer-file-coding-system-for-read coding-system-for-read return-val visit filename coding-system run-hook-with-args insert-file-contents-access-hook run-hook-with-args-until-success insert-file-contents-pre-hook find-file-coding-system-for-read-from-filename raw-text find-coding-system lwarn notice "Invalid coding-system (%s), using 'undecided" undecided insert-file-contents-internal used-codesys start end replace] 9)
  insert-file-contents("~/News/agent/lib/categories" nil nil nil nil)
  mm-insert-file-contents("~/News/agent/lib/categories" nil nil nil nil)
  nnheader-insert-file-contents("~/News/agent/lib/categories")
  byte-code("..." [gnus-agent-directory new-list old-list nnheader-insert-file-contents nnheader-concat "lib/categories" read nil (byte-code "Àp!‡" [read] 2) ((error)) mapcar #<compiled-function (from "/home/oub/xemacs/site-lisp/packages/ma-gnus-09/lisp/gnus-agent.elc") (c) "...(59)" [symb #:result c #:result-tail #:head2 #:head1 delete* nil ... valu] 7 0x42ee>] 5)
  gnus-category-read()
  gnus-open-agent()
  gnus-agentize()
  gnus-1(nil nil nil)
  gnus(nil)
  call-interactively(gnus)