A system comprising at least one hardware processor configured to perform: accessing a software robot computer program for controlling at least one application program to perform a task comprising a first sub-task to be performed by a first application program; generating an object hierarchy comprising a plurality of objects corresponding to active graphical user interface (GUI) elements of the first application program; and controlling the first application program to perform the first sub-task. The controlling includes identifying, using the software robot computer program, a first action to perform in furtherance of the first sub-task; automatically accessing, in the object hierarchy, a first object corresponding to a first active GUI element of the first application program, the accessing comprising refreshing the object hierarchy; and automatically using the first object to cause the first application program to at least partially perform the first action.