First, you should focus only on Sequence Diagrams. Even if you are not interested in sequence diagrams, since they are working without Graphviz, it is somehow simplier to let them work. And if they do not work, other diagrams will probably also not work.
You should then test Sequence Diagrams using the command line, and not in the target tool you want to install (Eclipse, Word, Mediawiki...) :
sequenceDiagram.txtfile, you can have a very simple test:
@startuml Alice -> Bob: test @enduml
-verbose flag is used to generated some logs
that you can send to us, if no
image is generated.
-Djava.awt.headless=truein the command line.
If this is working, but not in your tool, it is probably due to a specific tool issue:
C:\Windows\system32\cmd.exefor the account the PHP web service extension is running under. PHP needs those permissions to "fork" other processes.
Once sequence diagrams are working fine, you can focus on others diagrams.
If Graphviz is not installed on your system, you have to install it first.
You may have to set GRAPHVIZ_DOT variables if you have not choosen the default installation directory of Graphviz.
To test the installation of Graphviz, you can use the command line:
@startuml testdot @enduml
Once again, you should test using the command line and the
classDiagram.txtcan be very simple:
@startuml A <|-- B @enduml
If you still have issues, then you can send us a mail.