in reply to Re: Search and replace the word in Column 16
in thread Search and replace the word in Column 16

I don't think you meant split /|/ as witnessed by the the output of the following:

print +join '*', split /|/, 'AT0000937503|20060530|||142.708534||GROUP + AG|30618720||||OPEN|ISIN|4943402|VSE|STOCK|39600000|0.77320';
You need to escape the regex metacharacter '|'.

/J\