It is known fact that "go to the main table form" functionality uses FormRef property on the table to determine which form should be opened (a menu item can be specified there pointing the required form). The interesting fact is that even if FormRef is not specified on the table AX will still try to open some form. Actually AX will look for display menu item which has the name equals to the table name.
Frustrating thing is that if such menu item does not exist the warning will be shown on clicking "go to the main table form":
No object specified on menu item %TableName%.