To clear existing routed tracks and vias, except GND and Diff Pairs.
Altium > PCB Fliter
(IsTrack or isVia) and OnSignal and not InNet('GND') and not InAnyDifferentialPair
Delete Filtered Selection
Altium > Script > Export Specctra DSN
# My Do
select all nets
unselect net GND
unprotect all wires
unprotect all vias
lock net GND
protect net GND
protect all dpairs
unselect net GND
unprotect all wires
unprotect all vias
lock net GND
protect net GND
protect all dpairs
print {Tax via 5 (high)}
reset
tax via 5
bestsave on "tax_via_5"
autoroute
report summary "tax via 5"
# End My Do
Electra > Altium
Electra
Run My Do
File > Export Routes
Tip:
Do Not Assume any Existing *.rte files are good, always Export > Routes
Altium
File > Import Specctra Route
Design Netlist > Clean All Nets
Run DRC > Review and Fix as Needed
Altium PB Filter
Istrack and OnSignal and not InAnyDifferentialPair
Altium
Route > Retrace Selected (Shortcut Keys UC)
Tips:
Altium
Preferences > PCB Editor > Gloss And Retrace > Miter Ratio 3