Hello,

I have read through the Vim9.txt, and can not find a solution to this issue. 
When I call Parse(), the script version with the entire command on one line (|) 
gives error 'E121: Undefined variable: udp' in function add().
Both commands work if used on the command line, so its particular to running in 
a Vim9 script.

This works:
def g:Parse(): void
        var udp: list<string>

        :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
        :3substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
        # :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
        #       | substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
        
        echo udp
enddef

This does not work:
def g:Parse(): void
        var udp: list<string>

        # :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
        # :3substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
        :3global/^\s*<per/substitute/^\s*<per\(.\{-}"\)\{2}\|\s\+>.*$//g
                | substitute/\s\+.\{-}"\zs.\{-}\ze"/\=add(udp, submatch(0))/gn
        
        echo udp
enddef

Thanks,
Chainsaw

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