I have just installed Demeter and the first thing Athena does, when asked to plot (mu(E)) of an averaged standard spectrum (S-K-edge of CaSO4, averaged in sixpack), is to give the following error message: 

"Use of uninitialized value in multiplication(*) at C:/strawberry/perl/site/lib/Math/Spline.pm line 36." 

Also E0 is 0 and in front of a red background. So it seems to have trouble finding E0. But why? 

What does this mean? What do I have to do to get athena to work? 

attached is the CaSO4 spectrum in question. 

Thanks! 

Yael Kirsch