I've been redirecting outputs to a separate notebook using this simple code to modify the $Post variable:

nbout = CreateDocument[]

$Post = Function[expr, SelectionMove[nbout, Next, Cell];
   NotebookWrite[nbout, Cell[BoxData@ToBoxes@expr, "Output"]]];

This works nicely except for code that does normally not generate output, i.e. lines with ";". For those lines, a Null output is generated in the nbout notebook.

Is there a simple way to suppress this output?

Many thanks in advance for any advice.

  • 1
    $\begingroup$ You can write: If[expr === Null, ...]. $\endgroup$ Jun 8, 2022 at 8:50
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    – Michael E2
    Jun 8, 2022 at 15:56
  • $\begingroup$ Thank you ! This works. $\endgroup$
    – Jan
    Jun 8, 2022 at 18:10


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