Dear Paolo,<br>
The matdyn.x is for sure running on a single processor. The Ru-Pd
alloy system I studied is an immiscible system, that is to say, the
alloy has positive heat of formation and is artificially created nonequilibrium alloy. I don't know if this feature
can lead to this error, but I indeed obtained the phonon spectra of this
alloy system in cubic structures.<br>
<br>
Sincerely,<br>
<br>
Yi Kong<br clear="all"><br>-- <br>=============================<br>Yi Kong<br>Department of MSE<br>Tsinghua University<br>PR China, 100084<br>=============================