Please allow me to ask in this thread something slightly off-topic: why doesn't ConTeXt give a compilation error or alike when encountering such kind of mistakes? Is it technically difficult, or is it conventional for *TeX processors to be over tolerant? On Sun, Feb 9, 2020 at 11:05 PM Wolfgang Schuster < wolfgang.schuster.lists@gmail.com> wrote:

On Mon, 10 Feb 2020 05:58:50 +0800 Jon Wong wrote:

...

MWE:

\starttext

The famous result (and again) is given by \placeformula[formulalabel] \startformula c^2 = a^2 + b^2. \stopformula And now we can refer to formula \ref[][formulalabel].

\stoptext

There is a blank where the formula label should be at “now we can refer to formula ---“.

Use \ref[number][formulalabel] or \in[formulalabel].

Wolfgang

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