Hello,

thank you for your reply.

That helped me a lot!

Regards
Lars

Probably this is not the best way, but I dont know other way. As you know how many characters the prefix has, you can try something like this:

o.number[0:2] for example. Just set the correct range. Same for years.

Like i say, its not the best way, if the prefix or years character numbers change, you should change the report too... But I dont know other way.