showLastLength

[David Sumbler]

I have never used 'showLastLength' or 'showFirstLength' until today.

I inserted a line such as
        showLastLength = R1*5
exactly as shown in NR3.4.2, immediately before the first (and only)
\score { } section.

But every time I try to compile the file I get:

        syntax error, unexpected SYMBOL

        showLastLength = R1*5

Why might this be?

I am using Lilypond v2.19.82

David