Correct version number

dist/iwmlib.js

@@ -3232,7 +3232,9 @@
 
         keepOnStage(velocity, collision = 0.5) {
             let stagePolygon = this.containerPolygon;
-            if (!stagePolygon) return
+            // UO: since keepOnStage is called in nextVelocity we need to 
+            // ensure a return value
+            if (!stagePolygon) return { x: 0, y: 0}
             let polygon = this.polygon;
             let bounced = this.bouncing();
             if (bounced) {

dist/iwmlib.pixi.js

@@ -6396,7 +6396,9 @@
 
         keepOnStage(velocity, collision = 0.5) {
             let stagePolygon = this.containerPolygon;
-            if (!stagePolygon) return
+            // UO: since keepOnStage is called in nextVelocity we need to 
+            // ensure a return value
+            if (!stagePolygon) return { x: 0, y: 0}
             let polygon = this.polygon;
             let bounced = this.bouncing();
             if (bounced) {
@@ -7854,7 +7856,6 @@
          * @memberof Tile
          */
         destroy(options, debug = false) {
-            if (this.parent != null) ;
             let count = this.unregister();
             if (count <= 0) {
                 let opts = { children: true, texture: true, baseTexture: true };
@@ -7866,6 +7867,11 @@
                 if (debug) console.log("Tile.destroy", deepZoomTileCache.size, opts);
                 super.destroy(opts);
             }
+            if (this.parent != null) {
+                // UO: Emit warning and remove
+                console.warn("Destroying tile with parent. Hiding instead");
+                this.visible = false;
+            }
         }
     }
 
@@ -7931,9 +7937,14 @@
                 console.warn("Tile already loaded");
                 tile.unregister();
             }
-            tile = new Tile(texture, url);
-            this.loaded.set(url, tile);
-            this.tiles.tileAvailable(tile, col, row, url);
+            try {
+                tile = new Tile(texture, url);
+                this.loaded.set(url, tile);
+                this.tiles.tileAvailable(tile, col, row, url);
+            } catch (error) {
+                console.warn("Tile loading error", error);
+            }
+            
         }
     }
 

lib/pixi/deepzoom/loader.js

@@ -62,9 +62,14 @@ export class TileLoader {
             console.warn("Tile already loaded")
             tile.unregister()
         }
-        tile = new Tile(texture, url)
-        this.loaded.set(url, tile)
-        this.tiles.tileAvailable(tile, col, row, url)
+        try {
+            tile = new Tile(texture, url)
+            this.loaded.set(url, tile)
+            this.tiles.tileAvailable(tile, col, row, url)
+        } catch (error) {
+            console.warn("Tile loading error", error)
+        }
+        
     }
 }
 

lib/pixi/deepzoom/tile.js

@@ -59,9 +59,6 @@ export class Tile extends PIXI.Sprite {
      * @memberof Tile
      */
     destroy(options, debug = false) {
-        if (this.parent != null) {
-
-        }
         let count = this.unregister()
         if (count <= 0) {
             let opts = { children: true, texture: true, baseTexture: true }
@@ -73,5 +70,10 @@ export class Tile extends PIXI.Sprite {
             if (debug) console.log("Tile.destroy", deepZoomTileCache.size, opts)
             super.destroy(opts)
         }
+        if (this.parent != null) {
+            // UO: Emit warning and remove
+            console.warn("Destroying tile with parent. Hiding instead")
+            this.visible = false
+        }
     }
 }

package.json

@@ -1,6 +1,6 @@
 {
     "name": "iwmlib",
-    "version": "1.0.8",
+    "version": "1.0.9",
     "description": "An Open Source library for multi-touch, WebGL powered applications.",
     "main": "index.js",
     "directories": {