![](https://secure.gravatar.com/avatar/58128ef2fa853eca7f2503a152c340ae.jpg?s=120&d=mm&r=g)
On May 29, 2006, at 9:01, Taco Hoekwater wrote:
Hans van der Meer wrote:
Something strange occurs in math, doing:
\placeformula\startformula H(K|M,C) = H(K|C) - H(M|C)\eqno{\hbox{(\in{}[eq:keyapp])}} \stopformula
Please use:
\placeformula[-]\startformula
produces the following error: ------------------------------------ ! You can't use `\eqno' in math mode.
This message is a bit misleading. Knuth means to say:
! You can't use `\eqno' in non-display math mode.
Taco, Thanks for that explanation. I would not have found out by myself that this error is not about being in math mode, but about being in a numbered equation. I am inclined to stick to this as a bug. Not of ConTeXt, of course, but of TeX's error reporting system. It would be nice if someone in the pdfetex community took it as a challenge to make this error item more to the point. Hans van der Meer