--- a/MiniDebugger.st	Fri Dec 06 16:42:22 2013 +0100
+++ b/MiniDebugger.st	Fri Dec 06 16:49:22 2013 +0100
@@ -566,7 +566,7 @@
 
     |id proc bool|
 
-    commandArg notEmpty ifTrue:[
+    commandArg notEmptyOrNil ifTrue:[
         id := Number readFrom:commandArg onError:nil.
         id notNil ifTrue:[
             proc := Process allSubInstances detect:[:p | p id == id] ifNone:nil.
@@ -1032,10 +1032,10 @@
 !MiniDebugger class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libbasic/MiniDebugger.st,v 1.90 2013-12-06 15:42:22 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic/MiniDebugger.st,v 1.91 2013-12-06 15:49:22 cg Exp $'
 !
 
 version_CVS
-    ^ '$Header: /cvs/stx/stx/libbasic/MiniDebugger.st,v 1.90 2013-12-06 15:42:22 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic/MiniDebugger.st,v 1.91 2013-12-06 15:49:22 cg Exp $'
 ! !