updating PCB

[hajri_abderaouf]

Hi,
is it possible to delete all connection from pcb before new updating?

[robertferanec]

Hello hajri_abderaouf. Did you try filter?

I do not have access to Altium at this moment, but go to filter and try something like "isTrack or isVIA or isPoly", check "Select" and hit "Delete" on keyboard.