General ⇒ Latex Error

[darren]

{\writing
\fbox{
\parbox{160mm}{Thus $X\sim \mbox{Bin}(n, p)$ if $X$ is the number
of successes out of $n$ independent trials, each of which has
probability $p$ of success.}}}

These are part of my LateX output but i have an error message telling me that :

X ! Undefined Control Sequence
1.1881{\writing...

i was just curious , what does that trying to tell?

[gmedina]

{\writing
\fbox{
\parbox{160mm}{Thus $X\sim \mbox{Bin}(n, p)$ if $X$ is the number
of successes out of $n$ independent trials, each of which has
probability $p$ of success.}}}

These are part of my LateX output but i have an error message telling me that :

X ! Undefined Control Sequence
1.1881{\writing...

i was just curious , what does that trying to tell?

It's trying to tell you exactly what it's telling you! You are using a command (\writing, in this case) that has not been previously defined.