Hi all! I have just encountered a bugger of a problem with my MFC code. I initialise my map data in the document constructor, but when I access this data laters, the values have been overwritten with rubbish (6456988, -345879345, 34583496, etc). Strangely, this only happens for the objects (those initialised during the first loop). The tile layers are initialised perfectly. My code is listed below.... CLevelEditorDoc::CLevelEditorDoc() { int i; // initialise all the variables this->all_buildings = new building[MAX_OBJECTS]; this->all_civilians = new civilian[MAX_OBJECTS]; this->all_enemies = new enemy[MAX_OBJECTS]; this->all_powerups = new powerup[MAX_OBJECTS]; for (i=0 ; i.state = -1; all_civilians.state = -1; all_civilians.accel = 0; all_civilians.anim_counter = 0; all_civilians.anim_speed = 0; all_civilians.bonus = 0; all_civilians.curr_frame = 0; all_civilians.decel = 0; all_civilians.direction = 2; all_civilians.explosion = 0; all_civilians.health = 100; all_civilians.height = 24; all_civilians.max_health = 100; all_civilians.shot_counter = 0; all_civilians.xv = 0; all_civilians.yv = 0; all_enemies.state = -1; all_powerups.state = -1; all_powerups.accel = 0; all_powerups.anim_counter = 0; all_powerups.anim_speed = 0; all_powerups.curr_frame = 0; all_powerups.decel = 0; all_powerups.direction = 2; all_powerups.explosion = 0; all_powerups.health = 100; all_powerups.height = 32; all_powerups.max_health = 100; all_powerups.shot_counter = 0; all_powerups.xv = 0; all_powerups.yv = 0; } map_width = 60; map_height = 20; player_start.x = 50; player_start.y = 200; // and the tile layers this->base_layer = new base_tile[map_width * map_height]; this->fringe_layer = new fringe_tile[map_width * map_height]; for (i=0 ; i<map_width * map_height ; i++) { base_layer.tile = 0; if (i>=((map_height-1) * map_width)) base_layer.tile = 2; fringe_layer.tile = 0; fringe_layer.anim_counter = 0; fringe_layer.bonus = 0; fringe_layer.explosion = 0; fringe_layer.health = -1; fringe_layer.max_health = -1; fringe_layer.owner = 0; fringe_layer.shot_counter = 0; } for (i=map_width*(map_height-2) ; i<map_width*(map_height-1) ; i++) { fringe_layer.tile = 3; } } wow thanks for reading! If you have any suggestions, i would love to hear them! </i>

Ahh (expletive) sorry for posting with i as a looping variable. Mea culpe. But still... it is a vexing problem.

CDocument isn''t created from the constructor. If you''ll notice, the constructor is protected. It''s created dynamically from a CRuntimeClass that''s returned from CObject''s "GetRuntimeClass" method. Confusing enough for you? =)

What you need to do is make sure that you move all of the constructor code you have into the function CDocument::OnNewDocument, and all of the destructor code into CDocument::DeleteContents. I don''t know if you have an SDI or MDI application, but you might want to look at the other members too (OnCloseDocument, OnOpenDocument). Hope that helps.