--- a/SubCanvas.st	Tue May 22 18:47:32 2018 +0200
+++ b/SubCanvas.st	Tue May 22 18:51:17 2018 +0200
@@ -291,7 +291,7 @@
 rebuild
     "rebuild my GUI from the spec."
 
-    |subSpec subWindowSpec savedView savedBuilder builderClass hasHScroller hasVScroller|
+    |subSpec subWindowSpec savedView savedBuilder builderClass hasHScroller hasVScroller sameAppAsTopApp|
 
     "/ if the superView is not yet created,
     "/ we MUST delay building... (sigh)
@@ -460,12 +460,17 @@
             "/ mhm - it is opened freshly
             "/ if not called here, we'd loose this message 
             "/ (my appSubView sends this when it gets realized)   
-            client postOpenAsSubcanvasWith:builder
+            sameAppAsTopApp := client == builder window topView application.
+            sameAppAsTopApp ifTrue:[
+                client postOpenAsSubcanvasWith:builder
+            ] ifFalse:[
+                client postOpenWith:builder
+            ].    
         ].
     ]
 
     "Modified: / 30-01-2000 / 21:36:40 / cg"
-    "Modified (comment): / 22-05-2018 / 18:45:58 / Claus Gittinger"
+    "Modified: / 22-05-2018 / 18:50:47 / Claus Gittinger"
 !
 
 releaseAllComponents