Hi Gromacs Friends,<br> <br> I am performing justin tutorial for umbrella sampling .. <br><a href="http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin/gmx-tutorials/umbrella/05_pull.html">http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin/gmx-tutorials/umbrella/05_pull.html</a><br>
I encounter with following problem while using the <a href="http://disatances.pl">disatances.pl</a> script <br><br>1. After command perl <a href="http://distances.pl">distances.pl</a> I got following message ...<br><br><br>
Use of uninitialized value $distance in concatenation (.) or string at <a href="http://distances.pl">distances.pl</a> line 30.<br> readline() on closed filehandle IN at <a href="http://distances.pl">distances.pl</a> line 16.<br>
What may be reason for these ..<br>2. What is the groups.txt ??<br> Where it will find ?? Why it is needed??<br> <br>