Hi There Jenny

I've tried your steps a number of times, but keep getting the same error below!

Could you kindly help?

Thnx Ernest

Loading required package: graph
Loading required package: grid
Error in inDL(x, as.logical(local), as.logical(now), ...) :
  unable to load shared library 'C:/PROGRA~1/R/R-29~1.0/library/Rgraphviz/libs/Rgraphviz.dll':
  LoadLibrary failure:  The specified module could not be found.

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