Passing a config file with -version is invalid

[Kernald]

Using this command line:
plantuml -nometadata -p -tpng -config plantuml.skin < test_graph.puml > out.png

Works fine if the content of test_graph.puml is a regular graph. If it contains this:

@startuml
version
@enduml

Plantuml fails to generate anything:

ERROR
1
Syntax Error?
Some diagram description contains errors

[arnaudroques]

I think the issue come from the fact that the plantuml.skin config file contains some lines which are included before "version".
Can you check without any plantuml.skin config file ?
Thanks

[Kernald]

This is obviously the issue, but PlantUML should arguably not stop recognizing version because a configuration file has been specified.