Failed Assertions when compiling a bigger graph

Hi, whenever I try to compile the .dot file of a bigger graph (in my case a big UML diagram with clusters), I get the following error: failed at node 31[0] fdp: maze.c:313: chkSgraph: Assertion `np->cells[0]' failed. I am using the currently stable version 2.28.0 of graphviz (I can't use the Debian version because it doesn't support orthogonal edges yet, so I had to compile it myself). Does anyone have any idea how I could fix this? Thanks in advance Christopher Guckes

Failed Assertions when

This is probably a bug. You should consider filing a bug report at
  http://www.graphviz.org/content/graphviz-issue-tracker

Recent comments