you could turn it upside down:
code:
"Project Folder Number:" ?
GETS $projfile
WHILE 0=EXIST ("$workingdir\$projfile\*.dgn")
  "does not exist. give existing one" ?
  GETS $projfile
loop
SHELL "XCOPY $workingdir\$projfile $DestDir\$projfile /E /I /Q" ?
_________________________
!

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