diff --git a/oscar64/InterCode.cpp b/oscar64/InterCode.cpp
index 1fd2a2b..17613b9 100644
--- a/oscar64/InterCode.cpp
+++ b/oscar64/InterCode.cpp
@@ -4253,6 +4253,7 @@ InterCodeBasicBlock::InterCodeBasicBlock(InterCodeProcedure * proc)
 	mChecked = false;
 	mTraceIndex = -1;
 	mUnreachable = false;
+	mValueRangeValid = false;
 
 	mIndex = proc->mBlocks.Size();
 	proc->mBlocks.Push(this);
@@ -7236,6 +7237,8 @@ void InterCodeBasicBlock::RestartLocalIntegerRangeSets(int num, const GrowingVar
 	{
 		mVisited = true;
 
+		mValueRangeValid = false;
+
 		mEntryValueRange.SetSize(num, false);
 		mTrueValueRange.SetSize(num, false);
 		mFalseValueRange.SetSize(num, false);
@@ -7266,7 +7269,6 @@ void InterCodeBasicBlock::RestartLocalIntegerRangeSets(int num, const GrowingVar
 				vr.mMaxState = IntegerValueRange::S_UNKNOWN;
 		}
 
-
 		UpdateLocalIntegerRangeSets(localVars, paramVars);
 
 		if (mTrueJump) mTrueJump->RestartLocalIntegerRangeSets(num, localVars, paramVars);
@@ -15997,6 +15999,7 @@ void InterCodeProcedure::Close(void)
 	ResetEntryBlocks();
 	ResetVisited();
 	mEntryBlock->CollectEntryBlocks(nullptr);
+	BuildDataFlowSets();
 
 	DisassembleDebug("Followed Jumps 2");
 
diff --git a/oscar64/InterCode.h b/oscar64/InterCode.h
index dd3853c..26afdd5 100644
--- a/oscar64/InterCode.h
+++ b/oscar64/InterCode.h
@@ -349,7 +349,7 @@ public:
 	InterCodeBasicBlock			*	mTrueJump, * mFalseJump, * mLoopPrefix, * mDominator;
 	GrowingInstructionArray			mInstructions;
 
-	bool							mVisited, mInPath, mLoopHead, mChecked, mConditionBlockTrue, mUnreachable, mLoopPath;
+	bool							mVisited, mInPath, mLoopHead, mChecked, mConditionBlockTrue, mUnreachable, mLoopPath, mValueRangeValid;
 
 	NumberSet						mLocalUsedTemps, mLocalModifiedTemps;
 	NumberSet						mLocalRequiredTemps, mLocalProvidedTemps;
diff --git a/oscar64/oscar64.cpp b/oscar64/oscar64.cpp
index 3b900c1..e9018fb 100644
--- a/oscar64/oscar64.cpp
+++ b/oscar64/oscar64.cpp
@@ -74,7 +74,7 @@ int main2(int argc, const char** argv)
 
 #else
 		strcpy(strProductName, "oscar64");
-		strcpy(strProductVersion, "1.19.200");
+		strcpy(strProductVersion, "1.19.201");
 
 #ifdef __APPLE__
 		uint32_t length = sizeof(basePath);
diff --git a/oscar64/oscar64.rc b/oscar64/oscar64.rc
index a7d4d89..4c05dde 100644
--- a/oscar64/oscar64.rc
+++ b/oscar64/oscar64.rc
@@ -25,8 +25,8 @@ LANGUAGE LANG_ENGLISH, SUBLANG_NEUTRAL
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,19,200,0
- PRODUCTVERSION 1,19,200,0
+ FILEVERSION 1,19,201,0
+ PRODUCTVERSION 1,19,201,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -43,12 +43,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "oscar64"
             VALUE "FileDescription", "oscar64 compiler"
-            VALUE "FileVersion", "1.19.200.0"
+            VALUE "FileVersion", "1.19.201.0"
             VALUE "InternalName", "oscar64.exe"
             VALUE "LegalCopyright", "Copyright (C) 2021"
             VALUE "OriginalFilename", "oscar64.exe"
             VALUE "ProductName", "oscar64"
-            VALUE "ProductVersion", "1.19.200.0"
+            VALUE "ProductVersion", "1.19.201.0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/oscar64setup/oscar64setup.vdproj b/oscar64setup/oscar64setup.vdproj
index 154e0b0..0c40b4f 100644
--- a/oscar64setup/oscar64setup.vdproj
+++ b/oscar64setup/oscar64setup.vdproj
@@ -5181,15 +5181,15 @@
         {
         "Name" = "8:Microsoft Visual Studio"
         "ProductName" = "8:oscar64"
-        "ProductCode" = "8:{2DADB454-D7FF-4992-B9A1-CA813077CA71}"
-        "PackageCode" = "8:{656F1CB2-1F64-4848-B038-FD18DD310EC9}"
+        "ProductCode" = "8:{AED61249-4A7B-4472-9783-1F5014AC87EF}"
+        "PackageCode" = "8:{7F092DAD-940B-4A03-83D2-B4BC34BC0C44}"
         "UpgradeCode" = "8:{9AB61EFF-ACAC-4079-9950-8D96615CD4EF}"
         "AspNetVersion" = "8:2.0.50727.0"
         "RestartWWWService" = "11:FALSE"
         "RemovePreviousVersions" = "11:TRUE"
         "DetectNewerInstalledVersion" = "11:TRUE"
         "InstallAllUsers" = "11:FALSE"
-        "ProductVersion" = "8:1.19.200"
+        "ProductVersion" = "8:1.19.201"
         "Manufacturer" = "8:oscar64"
         "ARPHELPTELEPHONE" = "8:"
         "ARPHELPLINK" = "8:"