--- a/UnderflowError.st	Wed Jul 05 17:41:24 2017 +0200
+++ b/UnderflowError.st	Fri Jul 07 13:07:04 2017 +0200
@@ -11,6 +11,8 @@
 "
 "{ Package: 'stx:libbasic' }"
 
+"{ NameSpace: Smalltalk }"
+
 RangeError subclass:#UnderflowError
 	instanceVariableNames:''
 	classVariableNames:''
@@ -36,8 +38,11 @@
 
 documentation
 "
-    raised when the function-result underflows the allowed range.
-    (Float underflow)
+    raised when the function-result overflows the allowed range,
+    or when some other number (fraction) cannot be represented as instance of a particular
+    floating point format (Float underflow).
+
+    This error is usually proceedable and 0 is returned as result then.
 "
 ! !
 
@@ -50,7 +55,7 @@
 !UnderflowError class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libbasic/UnderflowError.st,v 1.4 2013-03-13 23:43:59 cg Exp $'
+    ^ '$Header$'
 ! !