Mark,

Do you maintain a matrix of colplot and gnuplot version compatibility
matrix? 

For example colplot has problem displaying legends for following version
combination. 
* collectl-utils-3.2.1-1 (colplot V4.6.3)
* Gnuplot V4.0 [gnuplot-4.0.0-14.el5]  on RHEL/OEL 5.8

This is because colplot is generating

In /usr/share/collectl/colplotlib.ph, its trying to set vertical for key.
But gnuplot V4.0 does not recognise vertical symbol for set key. It started
giving errors. I had to remove vertical for graphs to be generated with
legends. 

    # defaults for legend
    my $legend=$pparams->{legend};
    print  INI "set key top vertical right outside Right samplen 1 spacing
.7\n"
          if $pparams->{filetype}!~/term/ && $legend=~/on/;
    print  INI "set nokey\n"    if  $legend=~/off/i;


Regards,
Vishal Gupta
http://blog.vishalgupta.com


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