total length of a profile

[MassiVonWeizen]

or then though I grouped all the pipes ø48,3 in one group

means that at first he had several folders "tubo 48,3" and that you personally dragged the bodies into a unique folder?

 

[FIGOR71]

means that at first he had several folders "tubo 48,3" and that you personally dragged the bodies into a unique folder?

Yeah. .

 

[MassiVonWeizen]

when you make it solid, it warns you that "the modification of the separate will cancel the automatic generation blablabla.. . "
therefore means that it can no longer properly recalculate the properties.
if in separate cut you want to see only one voice by type of pipe a solution is:
do not change the folders, but exclude from the separate cut all folders except one by type of pipe; then in the distinct make the property appear total length

 

[FIGOR71]

when you make it solid, it warns you that "the modification of the separate will cancel the automatic generation blablabla.. . "
therefore means that it can no longer properly recalculate the properties.
if in separate cut you want to see only one voice by type of pipe a solution is:
do not change the folders, but exclude from the separate cut all folders except one by type of pipe; then in the distinct make the property appear total length

Yes, it appears. .
I'll use your method. .

Thank you. .