%
% properly started and restored,
%
_Gwiz.Vector any?
{
 "*" atleft
 {
%
% finished execution of Gwizard vector
%
  _Gwiz.Vector -1 left ofwiz
  ".ztz" overext
  empty !Gwiz.Vector
 }
 {
%
% still awaiting execution of vector
%
 } ifelse
}
{
%
% no current vector, check for new vector
%
 "ImrV_" textwild
 empty ofwiz
 empty
 {
  nextfile ?
%
% a vector file exists, execute downstream
%
  dup !Gwiz.Vector
  true ?
 } loop
 filing)
} ifelse