problem with gps 2.1.0

Hello,

I installed last stable release of gps (2.1.0), and here is what I get 
when I try to use menu "edit -> generate body" from a .ads file :
unrecognized switch: /users
unrecognized switch: /mpup371
unrecognized switch: /ada
unrecognized switch: /adago
unrecognized switch: /adago.gpr
unrecognized switch: /users
unrecognized switch: /mpup371
unrecognized switch: /ada
unrecognized switch: /adago
unrecognized switch: /go_game.ads
unrecognized switch: /users
unrecognized switch: /mpup371
unrecognized switch: /ada
unrecognized switch: /adago
ambiguous switch: / (matches 
/CURRENT_DIRECTORY,/NOCURRENT_DIRECTORY,/FULL,/NOFULL,/HEADER,/INDENTATION,/LINE_LENGTH,/QUIET,/NOQUIET,/SEARCH,/TREE_FILE,/VERBOSE,/NOVERBOSE)
Do I miss something  or is it a real problem with gps ?

thx

jf