Math & Science ⇒ Uppercase Omega becomes dark Box

[zainah]

Dear all,

I want to write the equation below, but when I run it, the Omega not come out (only become square dark box). Why this situation happen? Tq.

Code: Select all

v_3 = [{\it{l} \tau_3 + I_z \dot{\psi} \dot{ \phi} - (J_{t} {\Omega} + I_x\dot{\phi}) \dot{ \psi}}]/I_y \notag\\

[Stefan Kottwitz]

This code works for me and prints the Omega:

Omega.png (3.09 KiB) Viewed 4443 times

I extended your code snippet to make it compilable:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align}
  v_3 = [{\it{l} \tau_3 + I_z \dot{\psi} \dot{ \phi} - (J_{t} {\Omega}
    + I_x\dot{\phi}) \dot{ \psi}}]/I_y \notag\\
\end{align}
\end{document}

You see, the problem is not in the code which you posted. Please post a compilable minimal working example, which shows the problem. That's generally recommendable. Otherwise it's hard to help. For example, nobody knows your document class and used packages yet, not even which math environment you used.

Stefan

[zainah]

Dear sir,
You are right, when I run just only that code, it's work. But when I run true the whole document it become like in an attachment.

[Stefan Kottwitz]

Please follow the link to the explanation about a minimal working example which I wrote above, and here again. I suggest hack down a copy of your original code, i.e. reduce it, and post it here. Probably the cause is in your preamble.

For example, I can see that you use a different font. Possibly that one doesn't provide an Omega.

Stefan

[Hoed]

Probably the cause is in your preamble.

Had the same problem some time ago and solved it as you suggested. Thing was, that I had to re-arrange some packages in the preamble.

But again, zainah, please post a working example.