[rrd-users] Problem with my perl program..

Nanyi Gong ngon001 at ec.auckland.ac.nz
Mon Jan 21 10:52:06 MET 2002


      I have a problem when using PERL and RRDtool to produce GIF file.
If I write in this way: 

    RRDs::graph "web.gif",
    "--title", "web traffic",
    "--start", "1002687600",
    "--end", "1002700800",
    "--vertical-label","in KBps  ",

 I could produce a nice GIF image..But if I add these two lines:

    "CDEF:overweb=realweb,20,GT,20,0 IF", 

 There will be no image produced..Why?There also no error message??!!

  I'm a beginner of RRDtool and thank you very much for your help in advance.


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