Dear Agung,
Interface icon (you mean "circle" right?) is not supported in Sequence Diagram, yet. Now we hove post this issue to our issue tracking system and will implement this as soon as possible. The error you dumped is not related to this issue. A deprecated extensions (UMLValidator) are remained in your installation folders, so please delete the deprecated folder (C:/Program Files (x86)/StarUML/www/extensions/default/UMLValidator) and restart StarUML.
Thanks,
StarUML Team
2015년 2월 2일 월요일 오전 1시 50분 50초 UTC+9, Agung Andika 님의 말: