it seems to be a very strange filename for an IOS. normally they have a format like "c3640-jsx-mz.121-5.T4.bin" as an example for a 3640. Hope that helps, use another file, cheers -----Urspr|ngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]Im Auftrag von wangsr Gesendet: Freitag, 8. Juni 2001 17:18 An: [EMAIL PROTECTED] Betreff: About cisco 3660 IOS update [7:7737] I I tried many times to update IOS of cisco 3660 through TFTP ,but I failed . every time I come across the same error as below: Router#copy tftp fla Address or name of remote host [135.125.5.88]? Source filename [c3660.bin]? Destination filename [c3660.bin]? Accessing tftp://135.125.5.88/c3660.bin... %Warning: File not a valid executable for this system Abort Copy? [confirm] Router# Please tell me an idea to do it. Thanks. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=7738&t=7737 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]