On Jul 19, 2007, at 3:00 PM, David J. Zielinski wrote:

Hello, I am having a very weird error with the fruchterman_reingold.hpp file (from the most recent stable download 1.34.0, compiling under ubuntu 7.03) . When I run the fruchterman_reingold_force_directed_layout(...) function (after setting up the graph of course), the algorithm seems to sit on the first iterations.

However, if I add a printf at ~line 111, printf("col: %d row:%d\n",columns,rows); things run fine.

Any ideas?

That's disturbing. Could you try running it under valgrind to see if we have some kind of memory bug? That the addition of a printf makes things work probably means that we've been sloppy somewhere or we're triggering an optimizer bug in the compiler. Does the optimization level (none, -O1, -O2, etc.) have an impact on the behavior? - Doug