Try to mime-insert a text file in a mail, then undo, and repeat-complex-command. tm will kindly give you the mime encapsulation back, but with an empty file inside. The following patch fixes it. BTW, this bring another question to my mind: this problem was due to repeating the command in a non interactive fashion. What if repeat-complex-command let us choose to repeat in a [non]interactive way ? I'm not sure it's worth it, but ... 1998-04-23 Didier Verna <verna(a)inf.enst.fr&gt; * tm-edit.el (mime-editor/insert-file): if nil encoding, ask the user which one to use. --- lisp/tm/tm-edit.el.orig Thu Apr 23 14:27:28 1998 +++ lisp/tm/tm-edit.el Thu Apr 23 14:28:17 1998 ＠＠ -910,7 +910,7 ＠＠ (setq type (mime-prompt-for-type type) subtype (mime-prompt-for-subtype type subtype) )) - (if (or (interactive-p) verbose) + (if (or (interactive-p) verbose (null encoding)) (setq encoding (mime-prompt-for-encoding encoding)) ) (if (or (consp parameters) (stringp disposition-type))