In the ConTeXt manual (cont-eni.pdf) it says in the chapter on 
references by way of example:

> In this chapter, we can safely use references, without the danger of 
> clashing with references in other chapters. If we have a figure:
>
> \placefigure[here][fig:worldmap]{A map of the \TeX\ world}{...}
>
> In the chapter itself we can refer to this figure with:
>
> \in {figure} [fig:worldmap]

However, if I use this scheme on the following input:

> \placefigure[here][fig:exceptionhierarchy]{Sample~exception~hierarchy}%
> 	{\externalfigure[ExceptionHierarchy][scale=800]}
>
> By way of example, \in{figure}[fig:exceptionhierarchy] shows the
> hierarchy for ...

The following error trace occurs (TeXShop):

> floatblocks    : 1 placed
> ! Undefined control sequence.
> \doloop ...ndcsname \recurselevel \let \endofloop
>                                                   \dodoloop \dodoloop 1
> \removeunwantedspaces ...kip \else \exitloop \fi }
>                                                   \fi
> <argument> ...\ignorespaces \removeunwantedspaces
>                                                   \rightofreference
> \doifelsenothing #1->\edef \!!stringa {#1
>                                          }\ifx \!!stringa \empty 
> \expandafte...
> <argument> ...veunwantedspaces \rightofreference }
>                                                   {\egroup 
> \dosymbolreferenc...
>
> \doifreferencefoundelse ...ce \ifreferencefound #2
>                                        \rightofreference
> ...
> l.121 ...mple, \in{figure}[fig:exceptionhierarchy]
>                                                    shows the
> ?

What I am doing wrong? Or has some change in macros taken place?
I am using  the following version:
ConTeXt  ver: 2004.6.14  fmt: 2004.6.15  int: english  mes: english

I would be happy if someone can provide the answer.

Hans van der Meer