thank you for your answer Alex even if it was like you were speaking tagalog to me ^^'. I'm a jack of all trades but programming isn't amoung them.
Could you tell me how I can do to fix my duplicate object problem in my file ? By mistake, I duplicated all my work without noticing it and I continued to build... a lot... and yes I saved my work on 373 and above version... :.(
With all due respect for Chloe's work, I would take any solution available
Thanks in adavance