Rainer,
You can change the field length in the OUTBOUND HL/7 variant definition (I expect you have a variant defined).
I cannot recall if a value of zero or a value of -1 makes the field indeterminant in length, but one of those values works. I had to do this once before.
Jim Kosloskey
email: jim.kosloskey@jim-kosloskey.com 30+ years Cloverleaf, 61 years IT – old fart.