Pyroxene Error Message

[wat99]

I have uploaded my own pyroxene data, following the recommended template and have these error messages. I am unable to identify the problem. Any advice?

Error in pyroxene_fe3_HP (line 8)
I(1,1)=find(strcmp(headers,'SiO2'));

Error in MinPlot (line 101)
StrctFrm=pyroxene_fe3_HP(data,headers,wantstrctfrm); %calls pyroxene (w/Fe3+) calculation function, outputs the structural formula with cation assignment
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^