It works fine for me when i test most run 2 times for it two overwrite
If i want to save a graph just rename to eg
Then when run again a new graph will be again in the default
memory_graph.gv.pdf
.If i want to save a graph just rename to eg
factorial_grah.pdf
.Then when run again a new graph will be again in the default
memory_graph.gv.pdf
.