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Re: Numerical result out of range ... not solvable !

>  However, when
>  i use the command su to switch to user1 ( which i commented out from
>  /etc/passwd/) i get a message telling me that the user does not exist.

/etc/passwd is the list of users in a *nix operating system.
commenting out user1 makes that account no longer exist. you cannot
'su' to a user which doesn't exist.