I'm new to Latex and really learning the nuances as I go.

My document was compiling fine, until all of a sudden, it wasn't. I'm using the {longtable} command. I get the following error message:

Package array Error: Illegal pream-token (1): `c' used. ...}{Here, we are inputting g(x) into f(x).}

at this point in my code:

& & \multicolumn{1}{l}{Here, we are inputting g(x) into f(x).} \\ 

My code as a whole looks something like:

...other stuff....
\begin{longtable}{ m{4.5em}|c|c } 
...table stuff...
& & \\
& & \multicolumn{1}{l}{Here, we are inputting g(x) into f(x).} \\ 

Again, it was working perfectly fine, but then suddenly it started flagging errors out of seemingly nowhere.

What is Latex trying to tell me?

closed as off-topic by David Carlisle, Torbjørn T., Mensch, OSjerick, Sean Allred Nov 7 '15 at 23:51

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If this question can be reworded to fit the rules in the help center, please edit the question.

  • 4
    In the code fragment you show have used l for left alignment but the error message says you had used 1 (one) by mistake. – David Carlisle Oct 14 '15 at 7:58
  • unreleated but are you sure that shouldn't be $g(x)$ into $f(x)$ ? – David Carlisle Oct 14 '15 at 7:59
  • @DavidCarlisle Answer or close? – Torbjørn T. Nov 7 '15 at 22:12
  • @TorbjørnT. close, just typo (I voted) – David Carlisle Nov 7 '15 at 23:06
  • 4
    I'm voting to close this question as off-topic because simple 1/l typo – David Carlisle Nov 7 '15 at 23:07

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