while my $term (<F1>) {

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That is a syntax error.    Perhaps you meant: 

while ( my $term = <F1> ) {

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foreach my $source (<F2>) {

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Why would you read in the whole file instead of just reading one line at a time?    Perhaps you meant: 

while ( my $source = <F2> ) {

[download]

In reply to Re^2: Filtering Source Text File with 2nd Text File of Terms by jwkrahn
in thread Filtering Source Text File with 2nd Text File of Terms by Loops303

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