I am trying to install a program called FlowViewer(http://sourceforge.net/p/flowviewer/wiki/Home/) on CentOS 7. The program uses perl cgi scripts and requires GD::Graph. So I installed GD with yum and have the following packages installed:

- gd-devel-2.0.35-26.el7.x86_64
- gd-2.0.35-26.el7.x86_64
- perl-GD-2.49-3.el7.x86_64

But when I try to run the program (open the webpage that runs the program) it throws an error and I see this in apache error log:
[Tue Oct 06 12:39:24.937697 2015] [cgi:error] [pid 26710] [client 10.1.1.1:14025] AH01215: Undefined subroutine &GD::Graph::colour::read_rgb called at /var/www/cgi-bin/FlowViewer_4.6/FlowViewer_Main.cgi line 121., referer: http://10.2.2.2/cgi-bin/FlowViewer_4.6/FlowViewer.cgi?Performance^filter_hash=FV_^DDDMyRouter
So does this mean it isn't installed correctly? It looks like apache either can't find GD or some specific function in GD. Is this correct or am I misinterpreting this?
This is the actual line in the cgi script causing this error:
GD::Graph::colour::read_rgb("FlowGrapher_Colors") or die "cannot read colors";

In reply to Did GD::Graph not install correctly? by red888

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