It appears that the code 
$blast_report->next_result();

[download]
is returning undef instead of a blessed object. Is that object (StandAloneBlast) your code? Maybe it has error reporting options, or is supposed to return undef sometimes...?

In reply to Re: BioPerl StandAloneBlast is returning unexpected undefined SearchIO object by John M. Dlugosz
in thread BioPerl StandAloneBlast is returning unexpected undefined SearchIO object by WonkoTheSane

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