* probe setValue() rather than instrumClone() at terminal node value object

* group SNMP table management exceptions under TableRowManagement class
* preserve table row management exceptions propagation through MIB nodes
  tree to make row operartions working again

2 files changed, 11 insertions, 6 deletions

diff --git a/pysnmp/smi/error.py b/pysnmp/smi/error.py
index b65282d..b55e764 100644
--- a/pysnmp/smi/error.py
+++ b/pysnmp/smi/error.py
@@ -33,5 +33,6 @@ class NoSuchInstanceError(MibOperationError): pass
 class EndOfMibViewError(MibOperationError): pass
 
 # Row management
-class RowCreationWanted(MibOperationError): pass
-class RowDestructionWanted(MibOperationError): pass
+class TableRowManagement(MibOperationError): pass
+class RowCreationWanted(TableRowManagement): pass
+class RowDestructionWanted(TableRowManagement): pass
diff --git a/pysnmp/smi/mibs/SNMPv2-SMI.py b/pysnmp/smi/mibs/SNMPv2-SMI.py
index 4b60fd9..55e5602 100644
--- a/pysnmp/smi/mibs/SNMPv2-SMI.py
+++ b/pysnmp/smi/mibs/SNMPv2-SMI.py
@@ -527,13 +527,17 @@ class MibScalarInstance(MibTree):
 
     def setValue(self, value, name, idx):
         try:
-            if hasattr(self.syntax, 'instrumClone'):
-                return self.syntax.instrumClone(value)
+            if hasattr(self.syntax, 'setValue'):
+                return self.syntax.setValue(value)
             else:
                 return self.syntax.clone(value)
         except PyAsn1Error:
-            debug.logger & debug.flagIns and debug.logger('setValue: %s=%r failed: %s' % (self.name, value, sys.exc_info()[1]))
-            raise error.WrongValueError(idx=idx, name=name, msg=sys.exc_info()[1])
+            why = sys.exc_info()[1]
+            debug.logger & debug.flagIns and debug.logger('setValue: %s=%r failed: %s' % (self.name, value, why))
+            if isinstance(why, error.TableRowManagement):
+                raise why
+            else:
+                raise error.WrongValueError(idx=idx, name=name, msg=why)
 
     #
     # Subtree traversal