Hi GG,

I think that it is a little bit of a problem to use functionality from both graphutilities and combinatorica at the same time. As the error message says combinatorica is conflicting with the built-in functionality.

I did manage to use functionality from both in one notebook, and switch between the packages, using CleanSlate: http://library.wolfram.com/infocenter/TechNotes/4718/

This piece of code should work after CleanSlate is installed.

(*goto http://library.wolfram.com/infocenter/TechNotes/4718/ and \ follow the instructions*)

In[1]:= ClearAll["Global`*"]

In[2]:= RandomGraph[{20, 50}]

In[3]:= << Utilities`CleanSlate`

In[4]:= Needs << Combinatorica`

In[6]:= GraphPlot[RandomGraph[50, 0.1]]

In[7]:= Names["Combinatorica`*"]

In[9]:= g = RandomGraph[50, 0.1]

In[10]:= ListPlot[DegreeSequence[g]]

In[11]:= CleanSlate["Combinatorica`"]

During evaluation of In[11]:=   (CleanSlate) Contexts purged: {Combinatorica`}

During evaluation of In[11]:=   (CleanSlate) Approximate kernel memory recovered: 2999 Kb

Out[0]= {"Utilities`CleanSlate`", "TemplatingLoader`", \
"PacletManager`", "System`", "Global`"}

In[1]:= RandomGraph[{20, 50}]

It is important that you load "CleanSlate", before (!) you load Combinatorica. After that you can (in theory) load and unload Combinatorica functionality. The notebook is attached as well. This is not a good solution to your problem, but it might be a first step.

Cheers,

Marco

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