[Bug-apl] )copy problem

[enztec]

at the top of 
https://www.gnu.org/software/apl/APL_demo.html

there is 
0 0⍴⍎')COPY 5 HTML.apl'




when i do       )copy 0 HTML.apl
loading )DUMP file /apl/workspaces/HTML.apl...
      )fns
top4


but using the code from the APL_demo.html
      0 0⍴⍎')copy 0 HTML.apl'
VALUE ERROR
      )copy 0 HTML.apl
                   ^
      
my system problem or?   is 'script' involved?