Bash - Rename part of Filenames - bash

Question

i need , some help , with my mini-script , to Fix , Spanish Filename with ISO_8859-1 and/or with part of names like "&#00243"
The Script its there : http://www.pastebin.com/vT5Z2BqE
Yesterday with a 3 Things , are working , i add more , and dont work anymore , i dont understand why .
Look , if i use that command in a "Bash Shell" / "Gnome-Terminal" like :
inukaze#Inukaze:~$ cd Filenames_to_fix
inukaze#Inukaze:~/Filenames_to_fix$
inukaze#Inukaze:~/Filenames_to_fix$ expresion='&#00176'
inukaze#Inukaze:~/Filenames_to_fix$ sustituto='°'
inukaze#Inukaze:~/Filenames_to_fix$ ls *$expresion*
01 - La Espada del Augurio &#00176.avi
inukaze#Inukaze:~/Filenames_to_fix$ for i in $( ls $expresion ); do
> orig=$i
> dest=$(echo $i | sed -e "s/$expresion/$sustituto/")
> mv $orig $dest
> done
mv: no se puede efectuar stat' sobre «01»: No existe el fichero o el directorio
mv: no se puede efectuarstat' sobre «-»: No existe el fichero o el directorio
mv: no se puede efectuar stat' sobre «La»: No existe el fichero o el directorio
mv: no se puede efectuarstat' sobre «Espada»: No existe el fichero o el directorio
mv: no se puede efectuar stat' sobre «del»: No existe el fichero o el directorio
mv: no se puede efectuarstat' sobre «Augurio»: No existe el fichero o el directorio
mv: no se puede efectuar `stat' sobre «°»: No existe el fichero o el directorio
I need , the change of part of filename "&#00176" for "ª" , for example
Someone / somebody , can explain why this error , and how to fix it ???
I dont wanna interactive mode , and dont wanna replace "extension" i wanna "rename" the bad part of filename , with the "Good" character in its place :D.
Thank you for readme , and sorry my bad english , thank you for any help can you give me with this script

Answer 1

You do not quote $orig and $dest and that causes problems when the filename contains spaces (mv is given the file name as several separate arguments (which is why it prints several error messages with parts of the file name)). Try to use
mv "$orig" "$dest"
instead.

Answer 2

The for loop uses whitespace as a delimiter. Since your file name contains whitespace, you will need to change what you are using as a delimiter.
Here is the equivalent using find and while
find . -maxdepth 1 -name "*${expresion}*" -print0 | while read -d $'\0' file
do
orig="$file"
dest=$(echo "$file" | sed -e "s/${expresion}/${sustituto}/")
mv "$orig" "$dest"
done
HOWEVER, a better solution is probably to use the rename command:
rename $expresion $sustituto *${expresion}*

Answer 3

Is the rename command available?
rename $expresion $sustituto *$expresion*