I am experiencing several bugs when trying to import data as chi(k).

I have the data as a .dat ascii files with k the second column and the relevant chi(k) and corrected chi(k) as the 4th and 5th columns. This data was  previously exported as .xmu from athena, the k grid column was obtained as k ~= sqrt(0.262468*(E-E0)). When I try to import this new data back in athena, I get something totally different from expectations!