"The instruction at '0x00445141' referenced memory at '0x000000d0'. The memory could not be 'written'."

If "constraint" is set to "true" for either one of the edges or both, DOT works fine.

Just wanted to let you know that this very similar case partially works.

(ie a->b, a<-b, b->c, b<-c)

If you comment out the "a<-b" line DOT will run fine [note: "b->c, b<-c" is very similar to "a->b, a<-b" but only the latter edges (a->b, a<-b) cause problems].

Again, I get this Application Error message when I run the file unaltered:

The instruction at "0x00445141" referenced memory at "0x000000d0". The memory could not be "written".
Input:

digraph G {


	rankdir=LR;
	node [shape=record];


	destinationData1 [label ="<a> D IDl|<b>Forward Link|<c>Backward Link=0"];

	destinationData2 [label ="<a> D IDl|<b>Forward Link|<c>Backward Link=0"];


	// DD1 links
	destinationData1:b -> destinationData2:a [color=black, constraint=false]; //Forward Link

	//DD2 links

	destinationData2:c -> destinationData1:a [color=yellow, constraint=false];  //Backward Link


}