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IDProjectCategoryView StatusDate SubmittedLast Update
0000282graphvizDotpublic2003-09-20 10:412011-04-28 04:02
ReporterGary Coen 
Assigned Toerg 
PlatformOSx86-Windows-W2K ProOS Version
Summary0000282: dotty refuses to load my dag

I invoked dotty from the start menu, right clicked the GUI's canvas
control, and requested that it load a dot file that my program had
constructed. The operation failed, and a response dialog requested
that I complete this bug report.

I routinely use dotty to display dags created by my program. These
dags have aritrary content and form. It is very unusual for dotty to
refuse to load one--this being the first time it has occurred without
the problem being clearly caused by a bug in my dag data file.
Additional Information

[erg] Apparently, dot cannot do this graph. It loops or something in
setting the x coordinates.

Further investigation shows this to be the type of graph causing a huge
blowup due to dummy nodes. The graph goes from 337 nodes and 445 edges
to 42646 nodes and 64474 edges in dot_position. With ratio=compress
and size=4,4, finding the initial feasible tree takes several minutes.
The network simplex phase runs for a long, long time. Basically, dotty
can't load the dag because dot never finishes. It is probably necessary
to set nslimit to some more finite value.
TagsNo tags attached.
VERSION     1.8.2
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- Issue History
Date Modified Username Field Change
2011-04-28 04:02 user1 New Issue
2011-04-28 04:02 user1 Assigned To => erg

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