I have a file with the following content:
@startuml
sudoku
@enduml
and when I give the following command:
java -Djava.awt.headless=true -jar "D:/Programs/plantuml\plantuml.jar" -tlatex aa.pu
the resulting aa.latex is not a latex file but a png file. Same problem with latex:nopreamble
This happens with the latest plantuml.1.2018.7.jar file and also with the current beta version (downloaded an hour ago)