diff --git a/SuperScriptDecorator/DecoratorBB.py b/SuperScriptDecorator/DecoratorBB.py
index 791a83b..1537fc5 100644
--- a/SuperScriptDecorator/DecoratorBB.py
+++ b/SuperScriptDecorator/DecoratorBB.py
@@ -82,7 +82,7 @@ class BlocksFactory(object):
         # read datas
         for (output_obj, output_type, output_is_bb, ) in envir.m_Cursor.fetchall():
             # check dup
-            if output_obj in envir.m_WalkedOper or output_obj not in self.__AllOper:
+            if output_obj in envir.m_WalkedOper:
                 continue
             envir.m_WalkedOper.add(output_obj)
 
@@ -91,7 +91,8 @@ class BlocksFactory(object):
                 opers.add(output_obj)
             else:
                 # this oper point to non-pIn, should be add into result
-                results.add(output_obj)
+                if envir.m_Depth != 0:  # omit BB
+                    results.add(envir.m_QueryOper)
 
         # recursive calling opers to get root
         for oper in opers:
@@ -180,7 +181,7 @@ class BlocksFactory(object):
                 # we need add it manually
                 self.__AllOper.remove(operid)
                 bb.m_LowerOper.NewLayer(DecoratorData.TreeLayout.NO_REFERENCE_LAYER, DecoratorData.TreeLayout.NO_START_POS_OF_REF_LAYER)
-                bb.m_LowerOper.NewItem(self.m_Graph.m_BBDict[operid])
+                bb.m_LowerOper.NewItem(self.m_Graph.m_OperDict[operid])
 
                 # gotten "root" is oper's CKID, so use depth 1 to cheat this function
                 self.__RecursiveBuildOper(BuildOperEnvironment(
diff --git a/SuperScriptMaterializer/doc_export.cpp b/SuperScriptMaterializer/doc_export.cpp
index 972d11c..641c541 100644
--- a/SuperScriptMaterializer/doc_export.cpp
+++ b/SuperScriptMaterializer/doc_export.cpp
@@ -32,7 +32,7 @@ namespace SSMaterializer {
 			CKParameter* directSource = NULL;
 			CKObject* ds_Owner = NULL;
 			CKParameterIn* sharedSource = NULL;
-			CKBehavior* ss_Owner = NULL;
+			CKObject* ss_Owner = NULL;
 
 			// first, we analyse eLink
 			// check whether this is export parameter and write to database
@@ -113,23 +113,40 @@ namespace SSMaterializer {
 			if (sharedSource = analysed_pin->GetSharedSource()) {
 				//pIn from BB
 				mDb->mDbHelper.script_pLink.input = sharedSource->GetID();
-				ss_Owner = (CKBehavior*)sharedSource->GetOwner();
+				ss_Owner = sharedSource->GetOwner();
 				mDb->mDbHelper.script_pLink.input_obj = ss_Owner->GetID();
 
-				if (ss_Owner->IsUsingTarget() && (ss_Owner->GetTargetParameter() == sharedSource)) {
-					//pTarget
-					mDb->mDbHelper.script_pLink.input_type = DataStruct::pLinkInputOutputType_PTARGET;
-					mDb->mDbHelper.script_pLink.input_is_bb = TRUE;
-					mDb->mDbHelper.script_pLink.input_index = -1;	// omit
+				switch (ss_Owner->GetClassID()) {
+					case CKCID_BEHAVIOR: // CKBehavior
+					{
+						if (((CKBehavior*)ss_Owner)->IsUsingTarget() && (((CKBehavior*)ss_Owner)->GetTargetParameter() == sharedSource)) {
+							//pTarget
+							mDb->mDbHelper.script_pLink.input_type = DataStruct::pLinkInputOutputType_PTARGET;
+							mDb->mDbHelper.script_pLink.input_is_bb = TRUE;
+							mDb->mDbHelper.script_pLink.input_index = -1;	// omit
 
-				} else {
-					//pIn
-					mDb->mDbHelper.script_pLink.input_type = DataStruct::pLinkInputOutputType_PIN;
-					mDb->mDbHelper.script_pLink.input_is_bb = TRUE;
-					mDb->mDbHelper.script_pLink.input_index = ss_Owner->GetInputParameterPosition(sharedSource);
+						} else {
+							//pIn
+							mDb->mDbHelper.script_pLink.input_type = DataStruct::pLinkInputOutputType_PIN;
+							mDb->mDbHelper.script_pLink.input_is_bb = TRUE;
+							mDb->mDbHelper.script_pLink.input_index = ((CKBehavior*)ss_Owner)->GetInputParameterPosition(sharedSource);
+						}
+
+						break;
+					}
+					case CKCID_PARAMETEROPERATION:	// CKParameterOperation
+					{
+						//pOper only have pIn.
+						mDb->mDbHelper.script_pLink.input_type = DataStruct::pLinkInputOutputType_PIN;
+						mDb->mDbHelper.script_pLink.input_is_bb = TRUE;
+						mDb->mDbHelper.script_pLink.input_index = ((CKParameterOperation*)ss_Owner)->GetInParameter1() == sharedSource ? 0 : 1;
+						break;
+					}
+					default:
+						// the unexpected value. according to SDK manual,
+						// there are only 2 possible types
+						return;
 				}
-
-
 			}
 
 			// if the header of pLink has been analysed successfully,