bar length

Hi, my name is Massimo and i used proconcrete  Connect update 4

with comand "Modify Rebar" I identify 3f24 Pos2 Length 3235 mm with string "$n%%c$d $ll L=$ql"; in particular with string $ql proconcrete returns the total length of bar.

But if I measure the total length is 3189 mm instead 3235mm. Normally thi is not a problem; but in this case the junction is mechanic and 50 mm does difference.

I'd like to know where I make a mistake.

thank you very much.

Best regards and sorry for my english.