cancel package

[gunposer]

I am trying to use following expression

\begin{align}
thetaw\ddot{\varphi}(t)=thetaw\dot\upsilon(t) = \cancelto{0}{Mm} - M_R
\end{align}

but unfortunately the arrow is not pointing to zero.



Answer by Donald:

Update your cancel package or stop using pict2e.
pict2e breaks/changes some things; cancel ver 2.2
contains a work-around.


Donald Arseneau, TRIUMF CMMS, asnd@triumf.ca