hello
i am trying to replace spacific character in a text file
the text file contain several lins in a known format:
aaa ~ bbb ~ ccc ~ ddd ~ eee
fff ~ ggg ~ hhh ~ iii ~ jjj
and so on
i need to replace in the text file only the second "~" in each line to be "-":
aaa ~ bbb - ccc ~ ddd ~ eee
fff ~ ggg - hhh ~ iii ~ jjj

using the "replace" function won't help here
any idea?