Replace all TAB characters with white spaces

UNIX AIX
1

Dear Gurus

Can you please advise me on how to Replace all TAB characters with white spaces in a text file in AIX?

Either using vi or any utilities

2 
$ nawk '{sub(/^[ \t]+/," ")};1' infile
3

here's my two cents :

$ tr "\t" " " < infile > outfile

( infile has TABs ; outfile has SPACEs )

good luck, and success !
alexandre botao