Attempting a simple plot( arccsch(x),-1,1) leads to the error message

verbose 0 (3531: plot.py, generate_plot_points) WARNING: When plotting, 
failed to evaluate function at 200 points.

verbose 0 (3531: plot.py, generate_plot_points) Last error message: 'can't 
convert complex to float'


while the equivalent plot( arcsinh(1/x),-1,1) is error free. Since this 
worked in Sage 6.10 without problems, am I missing something simple or has 
there been a change of some sort?

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