I have installed Oracle 12C Standard Edition. Everything works fine there. I have also connected the Oracle SQL Developer Client 4.0. From that I can access the tables, indexes etc.

I am trying to see the tablespace details from SQL Developer Client by clicking the View -> DBA menu. By clicking this menu, nothing is getting opened. 

Through EM I can able to see those. But I want to see through SQL developer. 

I am not sure, whether I need to do any settings, so that the View -> DBA menu can be opened.

Attached Screenshot for reference:

Here I am selecting the DBA option under View Menu

![enter image description here](https://i.stack.imgur.com/asnZG.png)

But I don't see any DBA related window.

![enter image description here](https://i.stack.imgur.com/j5VMp.png)