The following creates a button to select a notebook to run. When the button is pressed it seems that Mathematica finds the notebook but cannot evaluate it. The following error occurs

Could not process unknown packet "1"

Button["run file 1", 

This occurs under Mathematica 8 on all platforms.

Any help greatly appreciated, Christina

  • 1
    $\begingroup$ Does using Button[..., Method->"Queued"] help? $\endgroup$
    – celtschk
    Commented May 22, 2012 at 17:08
  • $\begingroup$ Please evaluate this (and press the button) and report the result: Button["run file 1", TracePrint @ NotebookEvaluate[ "/../file1.nb"]] $\endgroup$
    – Mr.Wizard
    Commented May 22, 2012 at 17:10
  • $\begingroup$ Also, please try a fully qualified path name, e.g. "C:/User/Notebooks/file1.nb" or whatever. $\endgroup$
    – Mr.Wizard
    Commented May 22, 2012 at 17:11
  • 2
    $\begingroup$ Button[..., Method->"Queued"] worked. Many thanks celtschk and @Mr.Wizard $\endgroup$
    – Christina
    Commented May 22, 2012 at 17:26
  • $\begingroup$ @celtschk please post that as an answer, or I shall. Christina, glad you've got it working! $\endgroup$
    – Mr.Wizard
    Commented May 22, 2012 at 17:32

2 Answers 2


To make it work, use

Button["run file 1", NotebookEvaluate["/../file1.nb"], Method->"Queued"]

In the comments celtschk suggested Button[..., Method -> "Queued"] and Christina confirmed it as a solution.

  • 1
    $\begingroup$ @Christina does Button["run 1", NotebookEvaluate["/../file1.nb"]] also work by itself? $\endgroup$
    – Mr.Wizard
    Commented May 22, 2012 at 16:50
  • 1
    $\begingroup$ Great question @Mr.Wizard. It doesn't, I get the same error, so my question should actually be "How do I make NotebookEvaluate work inside Button?" I can't believe I didn't test that. $\endgroup$
    – Christina
    Commented May 22, 2012 at 16:56

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