--- a/ExternalStream.st	Sun Jan 05 17:29:37 2020 +0100
+++ b/ExternalStream.st	Sun Jan 05 17:35:06 2020 +0100
@@ -1577,42 +1577,19 @@
 !
 
 initialize
-    OpenErrorSignal isNil ifTrue:[
-	OpenErrorSignal := OpenError.
-	OpenErrorSignal notifierString:'open error'.
-
-	InvalidReadSignal := InvalidReadError.
-	InvalidReadSignal notifierString:'stream does not support reading'.
-
-	InvalidWriteSignal := InvalidWriteError.
-	InvalidWriteSignal notifierString:'stream does not support writing'.
-
-	InvalidModeSignal := InvalidModeError.
-	InvalidModeSignal notifierString:'binary/text mode mismatch'.
-
-	InvalidOperationSignal := InvalidOperationError.
-	InvalidOperationSignal notifierString:'unsupported file operation'.
-
-	StreamNotOpenSignal := StreamNotOpenError.
-	StreamNotOpenSignal notifierString:'stream is not open'.
-
-	StreamIOErrorSignal := StreamIOError.
-	StreamIOErrorSignal notifierString:'I/O error'.
-
-	"/ self patchByteOrderOptimizedMethods
-    ].
+    "/ self patchByteOrderOptimizedMethods
 
     Lobby isNil ifTrue:[
-	Lobby := Registry new.
-
-	"want to get informed when returning from snapshot"
-	ObjectMemory addDependent:self
+        Lobby := Registry new.
+
+        "want to get informed when returning from snapshot"
+        ObjectMemory addDependent:self
     ].
     DefaultEOLMode isNil ifTrue:[
-	self initDefaultEOLMode.
+        self initDefaultEOLMode.
     ].
     ReadMode isNil ifTrue:[
-	self initModeStrings.
+        self initModeStrings.
     ].
 
     "limit the amount of newspace to be used for non-tenurable executors to 5%"
@@ -1854,7 +1831,7 @@
 openErrorSignal
     "return the signal raised when a file open failed"
 
-    ^ OpenErrorSignal
+    ^ OpenError
 !
 
 streamIOErrorSignal
@@ -2559,7 +2536,7 @@
 
     "report an error, that the stream is a readOnly stream"
 
-    ^ InvalidWriteSignal raiseRequestWith:self "/ in:thisContext sender
+    ^ InvalidWriteError raiseRequestWith:self "/ in:thisContext sender
 
     "Modified: / 30.7.1999 / 17:08:19 / cg"
 !