I’m trying to test class from within of ABAP class builder. I pressed F8 (Test) but Create instance menu item is not active on test screen:

My class has both static and instance constructors. Where is my mistake? How to force this menu item to be active?
Is this parameter set to

public?Moreover, if it is, then it is probably because your class implements an interface. Just click the magnifying glass icon next to the interface name and you will both be able to execute static and instance methods.