loosing context and fails on second luafile luatemplate

Hi,

According to luafile help I tried to execute

luafile example3.lua from https://github.com/manoelcampos/xml2lua

It succeded on first try 

"~\source\xml2lua-master\example3.lua" [unix] 37L, 1054B
xml2lua v1.5-2


Manual print
  1 table: 011B1040
  2 table: 011B15B8

Recursive print
  tag
    tag1
      1
      2
xml2lua v1.5-2


but fails on second one as if it was loosing context.
Error detected while processing function LuaFile:
line    3:
...sers\foo.bar\source\xml2lua-master\example3.lua:25: attempt to get length of a nil value (field 'tag1')

Even I think it's not vim context pb but luafile context pb, 

Help would be gratefull.Thanks

NV

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