Too small map; lots of 'uninitiated values'

When I run 'netdisco -g', I get lots of what appear to be warning
messages:

 

 

n e t  d i s c o

--------------------------------------------------

graph() - Creating Graphs.

$S[0] has 2 nodes.

Creating new Graph

Use of uninitialized value in hash element at ./netdisco line 3061.

Use of uninitialized value in concatenation (.) or string at ./netdisco
line 3062.

  ! No link speed for ARRAY(0x948900c) ->

Use of uninitialized value in pattern match (m//) at ./netdisco line
3067.

Use of uninitialized value in pattern match (m//) at ./netdisco line
3071.

Use of uninitialized value in exists at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 728.

Use of uninitialized value in exists at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 548.

Use of uninitialized value in exists at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 575.

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 576.

Use of uninitialized value in string eq at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 589.

Use of uninitialized value in string eq at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 589.

Use of uninitialized value in string eq at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 589.

  Creating graph: /usr/local/netdisco/html/netmap.gif

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1036.

Use of uninitialized value in substitution (s///) at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1193.

Use of uninitialized value in pattern match (m//) at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1194.

Use of uninitialized value in concatenation (.) or string at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1194.

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1053.

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1107.

Warning: node 'node1', graph 'test' size too small for label

Warning: node 'node2', graph 'test' size too small for label

  Creating CMAP : /usr/local/netdisco/html/netmap.map

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1036.

Use of uninitialized value in substitution (s///) at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1193.

Use of uninitialized value in pattern match (m//) at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1194.

Use of uninitialized value in concatenation (.) or string at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1194.

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1053.

Use of uninitialized value in hash element at
/usr/lib/perl5/site_perl/5.8.5/GraphViz.pm line 1107.

Warning: node 'node1', graph 'test' size too small for label

Warning: node 'node2', graph 'test' size too small for label

 

I'm not sure what these are referring too or where they are initiated.
Anyway, the map does show up, but it way too small be useful; it's about
3" X 2".  I can see part of the names of a couple of nodes, but that's
all.

 

Otherwise, netdisco seems to be working as advertised, but without the
maps, it doesn't really do me any good.