Problems with File/Save

[Gaetano Vocca]

Dear vtcl users,
I'm experiencing a problem with the Save command of the File menu: it
simply refuses to save the file because an error occurs in the creation
of the backup file. It seems that the tcl "file rename" command doesn't
exist. I'm using tcl 7.5 and tk 4.1. Do I have to upgrade to newer
versions?
Thank you
Gaetano Vocca