pb with [VBA] saveas instruction in Macro

Hello Everybody,

First i apologize for my english.... I need your help

I built a powerpoint with graphics linked to an excel file. Now I want to generate several powerpoint file linked to different excel files.

But for each file the vba execution stopped at saveas instruction with this message in french sorry "La méthode 'SaveAs' de l'objet '_Presentation' a échoué." and if i do in manual mode there 's no problem after.

Where is my mystake ?

Thank you for your help, i'm desesperate