%
% is there a filespec
%
._MepSpec any?
{
%
% back-up the task tree
%
/*
 nod@?
"tchange" log)(
 {

  "Push" *persists
%
% save task tree as current mep for this
% mark tree as unchanged and save current contents
%

 } if
 nod@/
*/
%
% stack: pep-spec
%
 Tree.Save pop
} if