java.io.IOException: Cannot run program "dot": error=2, No such file or directory

[luoxinjie1146]

0_demo.ipynb
// same 3-point moving average filter as before
visualize(() => new FirFilter(8, Seq(1.U, 1.U, 1.U)))
[info] [0.000] Elaborating design...
[info] [0.071] Done elaborating.
Total FIRRTL Compile Time: 159.2 ms

java.io.IOException: Cannot run program "dot": error=2, No such file or directory
java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
scala.sys.process.ProcessBuilderImpl$Simple.run(ProcessBuilderImpl.scala:75)
scala.sys.process.ProcessBuilderImpl$AbstractBuilder.run(ProcessBuilderImpl.scala:104)
scala.sys.process.ProcessBuilderImpl$AbstractBuilder.run(ProcessBuilderImpl.scala:103)
dotvisualizer.FirrtlDiagrammer$.render(FirrtlDiagrammer.scala:93)
dotvisualizer.transforms.ModuleLevelDiagrammer.execute(ModuleLevelDiagrammer.scala:184)
dotvisualizer.transforms.MakeDiagramGroup.execute(MakeDiagramGroup.scala:48)
ammonite.$file.dummy.source.load$minusivy_2$Helper.generateVisualizations(Main.sc:155)
ammonite.$file.dummy.source.load$minusivy_2$Helper.visualize(Main.sc:173)
ammonite.$sess.cmd5$Helper.(cmd5.sc:1)
ammonite.$sess.cmd5$.(cmd5.sc:7)
ammonite.$sess.cmd5$.(cmd5.sc:-1)
java.io.IOException: error=2, No such file or directory
java.lang.UNIXProcess.forkAndExec(Native Method)
java.lang.UNIXProcess.(UNIXProcess.java:247)
java.lang.ProcessImpl.start(ProcessImpl.java:134)
java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
scala.sys.process.ProcessBuilderImpl$Simple.run(ProcessBuilderImpl.scala:75)
scala.sys.process.ProcessBuilderImpl$AbstractBuilder.run(ProcessBuilderImpl.scala:104)
scala.sys.process.ProcessBuilderImpl$AbstractBuilder.run(ProcessBuilderImpl.scala:103)
dotvisualizer.FirrtlDiagrammer$.render(FirrtlDiagrammer.scala:93)
dotvisualizer.transforms.ModuleLevelDiagrammer.execute(ModuleLevelDiagrammer.scala:184)
dotvisualizer.transforms.MakeDiagramGroup.execute(MakeDiagramGroup.scala:48)
ammonite.$file.dummy.source.load$minusivy_2$Helper.generateVisualizations(Main.sc:155)
ammonite.$file.dummy.source.load$minusivy_2$Helper.visualize(Main.sc:173)
ammonite.$sess.cmd5$Helper.(cmd5.sc:1)
ammonite.$sess.cmd5$.(cmd5.sc:7)
ammonite.$sess.cmd5$.(cmd5.sc:-1)

[seldridge]

Try installing graphviz for your distribution which provides the dot program.

[edwardcwang]

We could consider adding a more user-friendly error message here.

[Future-2100]

Problems solved, Thank you