On Sat, Apr 16, 2011 at 13:31, Reviczky, Adam <adam.revic...@kcl.ac.uk> wrote:
> ! Undefined control sequence.
> system          > tex > error on line 3 in file test.tex: Undefined control 
> sequence ...
>
> as far as I can tell it's the "|" symbol where it has problems.

The | symbol is not allowed unescaped in URLs. As per RFC 3986 section
2.2, the reserved delimiters are:

      reserved    = gen-delims / sub-delims

      gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"

      sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
                  / "*" / "+" / "," / ";" / "="

and as per section 2.3, the unreserved characters are:

unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"

Everything else needs to be %-encoded. If your browser isn't doing so,
you'll need to do it manually.


mathew
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