Means for securing against operating errors for leaves of a window or door that can be slid together

A fitting assembly (34) for two leaves (14a, 14b) of a window or door (10) that can be slid towards one another, the fitting assembly (34) comprising the following:

• a) a first connecting-rod assembly (24a) for a first one of the leaves (14a), wherein the first connecting-rod assembly (24a) is configured to be moved into a sliding position, in which the first leaf (14a) can slide, and into a blocking position, in which the first leaf (14a) cannot slide;
• b) a second connecting-rod assembly (24b) for a second one of the leaves (14b), wherein the second connecting-rod assembly (24b) is configured to be moved into a sliding position, in which the second leaf (14b) can slide, and into a blocking position, in which the second leaf (14b) cannot slide;
• wherein
• the fitting assembly (34) comprises a first projection (38) on the first connecting-rod assembly (24a) and the fitting assembly (34) comprises a second projection (40) that is configured to be arranged on the second leaf (14b), and wherein the first projection (38) is configured to pass by the second projection (40) when the leaves (14a, 14b) are slid towards one another in the blocking position of the first connecting-rod assembly (24a) and is configured to collide with the second projection when the leaves (14a, 14b) are slid towards one another in the sliding position of the first connecting rod assembly so that the first projection prevents the two leaves from being completely slid together until the first connecting rod assembly is moved to the blocking position.