Active object is a concurrency design pattern, which is based on allocating a single thread and control for each independent activity. However today in the era of multicore machines using one thread is a great disadvantage. Using a single thread may also cause deadlocks during the execution. That is why solution called multiactive object was presented and implemented in a java library called ProActive. The core idea of this solution is to make these activities multithreaded. In this work I will present a tool, which demonstrates the behavior of the multiactive objects based on the logs made by the library. The main purpose of the tool is to help users to debug their applications. Several use cases will be presented revealing main features of the tool and the way user should use them.