I think your problem is that you're reading from SAPR in list context (because of the print), so it's trying to read too much, and thus blocks...  Try 

        print scalar <SAPR>;

[download]

or 

        my $sap_line = <SAPR>;  # scalar context
        print $sap_line;

[download]

In that case you don't have to close SAPW.

In reply to Re: Pipe autoflush by almut
in thread Pipe autoflush by Zielony

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