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<font face="Courier New, Courier, monospace">Thank you for your
comment, it was very insightful. I've checked lambda.f90 as
suggested. I'm not an expert, but the formulas looked as expected,
so I've cross referenced them with my data, and indeed there was a
division by zero.<br>
<br>
A syntax error was on my part. I've used kpoints.x in order to
generate k points supplied to lambda.x. I've copy-pasted </font><font
face="Courier New, Courier, monospace"><font face="Courier New,
Courier, monospace">the output directly to lambda.x input</font></font><font
face="Courier New, Courier, monospace"><font face="Courier New,
Courier, monospace"><font face="Courier New, Courier, monospace">,
but the first column numbers the k points, which is not a part
of </font></font></font><font face="Courier New, Courier,
monospace"><font face="Courier New, Courier, monospace"><font
face="Courier New, Courier, monospace"><font face="Courier
New, Courier, monospace">lambda.x syntax thus, I had one
extra column. The column with weight was probably omitted
(as it was 5th instead of 4th), and the z component (all
0.0) was used as k-point weights.<br>
<br>
After the correction lambda.x produced the expected output.<br>
<br>
Thank you for your help!<br>
<br>
Regards,<br>
Maciej Szary<br>
<br>
</font></font></font></font>
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