Either use string eval 

  if( eval "require $isa" ) {

[download]

or block eval (adding ".pm") 

  eval { require "$isa.pm" }
  unless ($@) { ... }

[download]

(Update: fixed my reply several times... now it should finally be ok :)

In reply to Re^3: Perlfect search can't locate installed module DB_File.pm. by almut
in thread Perlfect search can't locate installed module DB_File.pm. by dbmathis

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