As I see it, your plugin is calling print("task....") which is not in the POE::Filter::Reference format. The parent process is trying to parse the child's output in a particular format, which it's not getting. As a result, the parent isn't displaying the output.

You can use STDERR as a plaintext back channel. Change the print() to warn(), and set up the POE::Wheel::Run object to use POE::Filter::Line for its StderrFilter:

  $_[HEAP]{child} = POE::Wheel::Run(
    ... stuff ...,
    StdinFilter => POE::Filter::Reference->new(),
    StdoutFilter => POE::Filter::Reference->new(),
    StderrFilter => POE::Filter::Line->new(),
  );
[download]

Untested, of course. :)

Then handle StderrEvent in the parent. As an added bonus, any errors or warnings in the child will be displayed by the parent. It's great for debugging the child process.

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