diff --git a/oscar64/InterCode.cpp b/oscar64/InterCode.cpp
index 0f0b401..12d1431 100644
--- a/oscar64/InterCode.cpp
+++ b/oscar64/InterCode.cpp
@@ -3783,6 +3783,7 @@ void InterCodeBasicBlock::GenerateTraces(bool expand, bool compact)
 				mInstructions[ns - 1]->mCode = IC_BRANCH;
 				mInstructions[ns - 1]->mOperator = tj->mInstructions[0]->mOperator;
 				mInstructions[ns - 1]->mSrc[0].Forward(tj->mInstructions[0]->mSrc[0]);
+				mInstructions[ns - 1]->mNumOperands = 1;
 				
 				mTrueJump = tj->mTrueJump;
 				mFalseJump = tj->mFalseJump;
@@ -10897,6 +10898,24 @@ void InterCodeProcedure::ResetVisited(void)
 
 	for (i = 0; i < mBlocks.Size(); i++)
 	{
+#if 0
+		if (mBlocks[i]->mInstructions.Size() > 0)
+		{
+			const InterInstruction* ins(mBlocks[i]->mInstructions.Last());
+			if (ins)
+			{
+				if (ins->mCode == IC_BRANCH)
+				{
+					assert(mBlocks[i]->mTrueJump && mBlocks[i]->mFalseJump && ins->mNumOperands >= 1 && ins->mSrc[0].mTemp >= 0);
+				}
+				else if (ins->mCode == IC_JUMP)
+				{
+					assert(mBlocks[i]->mTrueJump);
+				}
+			}
+		}
+#endif
+
 		mBlocks[i]->mVisited = false;
 		mBlocks[i]->mNumEntered = 0;
 	}
@@ -12334,6 +12353,10 @@ void InterCodeProcedure::MapCallerSavedTemps(void)
 
 	callerSavedTemps = freeCallerSavedTemps;
 
+	int maxCallerSavedTemps = mCallerSavedTemps;
+
+	assert(freeCallerSavedTemps <= mCallerSavedTemps);
+
 	mTempOffset.SetSize(0);
 	mTempSizes.SetSize(0);
 
@@ -12347,7 +12370,7 @@ void InterCodeProcedure::MapCallerSavedTemps(void)
 			mTempSizes.Push(size);
 			freeTemps += size;
 		}
-		else if (callerSavedTemps + size <= 16)
+		else if (callerSavedTemps + size <= maxCallerSavedTemps)
 		{
 			mTempOffset.Push(callerSavedTemps);
 			mTempSizes.Push(size);
@@ -12362,6 +12385,8 @@ void InterCodeProcedure::MapCallerSavedTemps(void)
 	}
 	mTempSize = calleeSavedTemps;
 	mCallerSavedTemps = callerSavedTemps;
+
+//	printf("Map %s, %d, %d, %d, %d\n", mIdent->mString, freeTemps, callerSavedTemps, calleeSavedTemps, freeCallerSavedTemps);
 }
 
 void InterCodeProcedure::Disassemble(FILE* file)
diff --git a/oscar64/NativeCodeGenerator.cpp b/oscar64/NativeCodeGenerator.cpp
index bdc4cce..5e1f6ee 100644
--- a/oscar64/NativeCodeGenerator.cpp
+++ b/oscar64/NativeCodeGenerator.cpp
@@ -18490,6 +18490,8 @@ bool NativeCodeBasicBlock::OptimizeSelect(NativeCodeProcedure* proc)
 				mIns.Push(NativeCodeInstruction(ASMIT_AND, ASMIM_IMMEDIATE, vt ^ vf));
 				mIns.Push(NativeCodeInstruction(ASMIT_EOR, ASMIM_IMMEDIATE, vt));
 				changed = true;
+
+				mBranch = ASMIT_JMP;
 			}
 		}
 
@@ -24139,6 +24141,8 @@ void NativeCodeBasicBlock::CheckLive(void)
 #if _DEBUG
 	uint32	live = 0;
 
+	assert(mBranch == ASMIT_RTS || (mBranch == ASMIT_JMP) == (mFalseJump == nullptr));
+
 	if (mBranch == ASMIT_BCC || mBranch == ASMIT_BCS)
 		live |= LIVE_CPU_REG_C;
 	if (mBranch == ASMIT_BEQ || mBranch == ASMIT_BNE || mBranch == ASMIT_BPL || mBranch == ASMIT_BMI)
@@ -24447,6 +24451,7 @@ void NativeCodeBasicBlock::CopyCode(NativeCodeProcedure * proc, uint8* target)
 NativeCodeBasicBlock::NativeCodeBasicBlock(void)
 	: mIns(NativeCodeInstruction(ASMIT_INV, ASMIM_IMPLIED)), mRelocations({ 0 }), mEntryBlocks(nullptr), mCode(0)
 {
+	mBranch = ASMIT_RTS;
 	mTrueJump = mFalseJump = NULL;
 	mOffset = -1;
 	mPlaced = false;
@@ -25051,6 +25056,11 @@ void NativeCodeProcedure::Optimize(void)
 	int		step = 0;
 	int cnt = 0;
 
+#if _DEBUG
+	ResetVisited();
+	mEntryBlock->CheckBlocks();
+#endif
+
 	bool	changed, xmapped = false, ymapped = false;
 	do
 	{
diff --git a/oscar64/oscar64.cpp b/oscar64/oscar64.cpp
index 262ede8..0c6c096 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, "1.7.136");
+		strcpy(strProductVersion, "1.7.137");
 
 #ifdef __APPLE__
 		uint32_t length = sizeof(basePath);
diff --git a/oscar64/oscar64.rc b/oscar64/oscar64.rc
index b513212..c5654a5 100644
--- a/oscar64/oscar64.rc
+++ b/oscar64/oscar64.rc
@@ -25,8 +25,8 @@ LANGUAGE LANG_ENGLISH, SUBLANG_NEUTRAL
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,7,136,0
- PRODUCTVERSION 1,7,136,0
+ FILEVERSION 1,7,137,0
+ PRODUCTVERSION 1,7,137,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -43,12 +43,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "oscar64"
             VALUE "FileDescription", "oscar64 compiler"
-            VALUE "FileVersion", "1.7.136.0"
+            VALUE "FileVersion", "1.7.137.0"
             VALUE "InternalName", "oscar64.exe"
             VALUE "LegalCopyright", "Copyright (C) 2021"
             VALUE "OriginalFilename", "oscar64.exe"
             VALUE "ProductName", "oscar64"
-            VALUE "ProductVersion", "1.7.136.0"
+            VALUE "ProductVersion", "1.7.137.0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/oscar64setup/oscar64setup.vdproj b/oscar64setup/oscar64setup.vdproj
index 3a8aab8..5c25de0 100644
--- a/oscar64setup/oscar64setup.vdproj
+++ b/oscar64setup/oscar64setup.vdproj
@@ -4127,15 +4127,15 @@
         {
         "Name" = "8:Microsoft Visual Studio"
         "ProductName" = "8:oscar64"
-        "ProductCode" = "8:{BBBB10E0-15E4-40FE-82D3-27647FE340EE}"
-        "PackageCode" = "8:{E0E1AE65-F11B-4329-9A7F-73C9326FFA33}"
+        "ProductCode" = "8:{FD2A310E-C047-46DB-BC3A-E4704ECC3697}"
+        "PackageCode" = "8:{C415E608-4EAB-4BF9-9990-83BC094DFF07}"
         "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" = "8:1.7.136"
+        "ProductVersion" = "8:1.7.137"
         "Manufacturer" = "8:oscar64"
         "ARPHELPTELEPHONE" = "8:"
         "ARPHELPLINK" = "8:"