Red Hat

awk: char.awk:3:   =sprintf("%c", 003)
awk: char.awk:3:   ^ invalid char '' in expression

BEGIN {
  FS=OFS="|"
  ^C=sprintf("%c", 003)
}
{
  sub("^[|]","")
  sub(^C "$","")
  while (n=index($0, ^C))
     $0=substr($0, 1, n-1) ORS $1 OFS substr($0, n+1)
  print
}

 gawk -f char.awk test8.out

 awk -f char.awk test8.out

gawk: char.awk:3:   =sprintf("%c", 003)
gawk: char.awk:3:   ^ invalid char '' in expression

nawk -f char.awk myFile

char.awk: 
BEGIN {
  FS=OFS="|"
  ctrlC=sprintf("%c", 003)
}
{
   sub("^[|]","")
   sub(ctrlC "$","")
   while (n=index($0,ctrlC))
      $0=substr($0,1,n-1) ORS $1 OFS substr($0,n+1)
   print
}