Error when creating Json block with component or rectangle

Question

​Error java.lang.ClassCastException: net.sourceforge.plantuml.descdiagram.DescriptionDiagram cannot be cast to net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram

java.lang.ClassCastException: net.sourceforge.plantuml.descdiagram.DescriptionDiagram cannot be cast to net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram

at net.sourceforge.plantuml.objectdiagram.command.CommandCreateJson.executeNow(CommandCreateJson.java:66)

at net.sourceforge.plantuml.command.CommandMultilines2.execute(CommandMultilines2.java:111)

at net.sourceforge.plantuml.command.ProtectedCommand.execute(ProtectedCommand.java:55)

at net.sourceforge.plantuml.AbstractPSystem.executeCommand(AbstractPSystem.java:158)

at net.sourceforge.plantuml.command.PSystemCommandFactory.executeFewLines(PSystemCommandFactory.java:125)

at net.sourceforge.plantuml.command.PSystemCommandFactory.createSystem(PSystemCommandFactory.java:108)

at net.sourceforge.plantuml.PSystemBuilder.createPSystem(PSystemBuilder.java:137)

at net.sourceforge.plantuml.BlockUml.getDiagram(BlockUml.java:179)

at net.sourceforge.plantuml.SourceStringReader.outputImage(SourceStringReader.java:159)

at net.sourceforge.plantuml.Pipe.generateDiagram(Pipe.java:101)

at net.sourceforge.plantuml.Pipe.managePipe(Pipe.java:92)

at net.sourceforge.plantuml.Run.managePipe(Run.java:354)

at net.sourceforge.plantuml.Run.main(Run.java:181)

You should send a mail to plantuml@gmail.com or post to http://plantuml.com/qa with this log (V1.2022.13)

ERROR

28

You should send a mail to plantuml@gmail.com or post to http://plantuml.com/qa with this log (V1.2022.13) java.lang.ClassCastException: net.sourceforge.plantuml.descdiagram.DescriptionDiagram cannot be cast to net.sourceforge.plantuml.objectdiagram.AbstractClassOrObjectDiagram

Some diagram description contains errors

JSON diagram seems to conflict when having a component.

If I change component to class it works. Everything works fine on the online editor. This is just happening in VSCode PlantUML previewer (https://marketplace.visualstudio.com/items?itemName=jebbs.plantuml). I updated to latest JAR.

@startuml

component ProcessCommunicationRequest

json Request {

"recipients": [

]

}

@enduml

Answer 1

Hello A., and all,

Perhaps add: allowmixing or allow_mixing

But without and with the last version (1.2022.14b6), it seems ok, as:

Enjoy.
Regards.

Comments

Not the original asker, but I'm having the same issue on V1.2022.13 which is the current version available via the Windows 'choco' installer. I downloaded the ~v1.2022.14beta7 release from GitHub and replaced the choco provided plantuml.jar with the beta release. It works fine with the beta jar.

Just a datapoint that to the extent this is/was a bug, it may have been fixed already in 2022.14.

Thanks for posting the results on beta, I would have not thought to try that.