Which in turn means you should check the top line of your program and make sure it points to your perl, i.e.: 
#!/usr/bin/perl

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Or run perl manually: 
perl myfile.pl

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In reply to Re^2: Error when using GD::Graph - "use: command not found" by saberworks
in thread Error when using GD::Graph - "use: command not found" by Lhamo_rin

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