The end block comment delimiter '/ causes image to not be generated if placed on the same line as commented text.
No error is generated!
Example:
@startuml
/'
!definelong CLASS()
!enddefinelong'/
class Foo {
Bar
}
@enduml
Wont generate any image or error message.
This code works:
@startuml
/'
!definelong CLASS()
!enddefinelong
'/
class Foo {
Bar
}
@enduml