Dear All<br><br>I want to make a new lattice, but before serious calculation,  I like to see the lattice.<br><br>I searched in the alps mailing list and I found that probably &quot;lattice-preview&quot; should be a tool for visualization of lattices in ALPS.<br>
But I have two problem: first, when simply I type &quot;lattice-preview&quot; in the terminal I receive the following error:<br><br>/opt/alps/bin/lattice-preview: 30: /opt/alps/lib/python/alps/preview.py: Permission denied<br>
<br>Is there anyone to know why I receive the error?<br><br>second, If we suppose the &quot;lattice-preview&quot; works well, what is the input file for this program?<br><br><br>thanks in advanced<br><br>Kaveh Edalat<br> <br>
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