diff --git a/source/adios2/toolkit/format/bp/BPSerializer.tcc b/source/adios2/toolkit/format/bp/BPSerializer.tcc
index 2592a45003..8414fa6eb5 100644
--- a/source/adios2/toolkit/format/bp/BPSerializer.tcc
+++ b/source/adios2/toolkit/format/bp/BPSerializer.tcc
@@ -98,6 +98,8 @@ void BPSerializer::UpdateIndexOffsetsCharacteristics(size_t &currentPosition,
                                                      std::vector<char> &buffer)
 {
     const bool isLittleEndian = helper::IsLittleEndian();
+    const uint8_t characteristicsCount =
+        helper::ReadValue<uint8_t>(buffer, currentPosition, isLittleEndian);
 
     const uint32_t characteristicsLength =
         helper::ReadValue<uint32_t>(buffer, currentPosition, isLittleEndian);
diff --git a/source/adios2/toolkit/format/bp/bp3/BP3Deserializer.cpp b/source/adios2/toolkit/format/bp/bp3/BP3Deserializer.cpp
index 141ddf1248..0698a499d7 100644
--- a/source/adios2/toolkit/format/bp/bp3/BP3Deserializer.cpp
+++ b/source/adios2/toolkit/format/bp/bp3/BP3Deserializer.cpp
@@ -29,7 +29,7 @@ namespace format
 std::mutex BP3Deserializer::m_Mutex;
 
 BP3Deserializer::BP3Deserializer(helper::Comm const &comm)
-: BPBase(comm), BP3Base(comm), m_Minifooter(3)
+: BP3Base(comm), BPBase(comm), m_Minifooter(3)
 {
 }
 
@@ -139,6 +139,8 @@ void BP3Deserializer::ParsePGIndex(const BufferSTL &bufferSTL,
 
     m_MetadataSet.DataPGCount = helper::ReadValue<uint64_t>(
         buffer, position, m_Minifooter.IsLittleEndian);
+    const size_t length = helper::ReadValue<uint64_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
 
     size_t localPosition = 0;
 
@@ -208,6 +210,11 @@ void BP3Deserializer::ParseVariablesIndex(const BufferSTL &bufferSTL,
         m_Minifooter.VarsIndexStart, m_Minifooter.PGIndexStart,
         " BP3 variable index start < pg index start, in call to Open");
 
+    const uint32_t count = helper::ReadValue<uint32_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
+    const uint64_t length = helper::ReadValue<uint64_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
+
     const size_t startPosition = position;
     size_t localPosition = 0;
 
@@ -312,6 +319,11 @@ void BP3Deserializer::ParseAttributesIndex(const BufferSTL &bufferSTL,
         m_Minifooter.AttributesIndexStart, m_Minifooter.PGIndexStart,
         " BP3 attributes index start < pg index start, in call to Open");
 
+    const uint32_t count = helper::ReadValue<uint32_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
+    const uint64_t length = helper::ReadValue<uint64_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
+
     const size_t startPosition = position;
     size_t localPosition = 0;
 
diff --git a/source/adios2/toolkit/format/bp/bp4/BP4Deserializer.cpp b/source/adios2/toolkit/format/bp/bp4/BP4Deserializer.cpp
index 54a87fd8f4..5ce632c1ef 100644
--- a/source/adios2/toolkit/format/bp/bp4/BP4Deserializer.cpp
+++ b/source/adios2/toolkit/format/bp/bp4/BP4Deserializer.cpp
@@ -33,7 +33,7 @@ namespace format
 std::mutex BP4Deserializer::m_Mutex;
 
 BP4Deserializer::BP4Deserializer(helper::Comm const &comm)
-: BPBase(comm), BP4Base(comm), m_Minifooter(4)
+: BP4Base(comm), BPBase(comm), m_Minifooter(4)
 {
 }
 
@@ -335,6 +335,8 @@ void BP4Deserializer::ParseVariablesIndexPerStep(const BufferSTL &bufferSTL,
     const auto &buffer = bufferSTL.m_Buffer;
     size_t position = m_MetadataIndexTable[submetadatafileId][step][1];
 
+    const uint32_t count = helper::ReadValue<uint32_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
     const uint64_t length = helper::ReadValue<uint64_t>(
         buffer, position, m_Minifooter.IsLittleEndian);
 
@@ -526,6 +528,8 @@ void BP4Deserializer::ParseAttributesIndexPerStep(const BufferSTL &bufferSTL,
     const auto &buffer = bufferSTL.m_Buffer;
     size_t position = m_MetadataIndexTable[submetadatafileId][step][2];
 
+    const uint32_t count = helper::ReadValue<uint32_t>(
+        buffer, position, m_Minifooter.IsLittleEndian);
     const uint64_t length = helper::ReadValue<uint64_t>(
         buffer, position, m_Minifooter.IsLittleEndian);
 
diff --git a/source/adios2/toolkit/format/bp/bp4/BP4Serializer.tcc b/source/adios2/toolkit/format/bp/bp4/BP4Serializer.tcc
index 05e908232b..b3b4296033 100644
--- a/source/adios2/toolkit/format/bp/bp4/BP4Serializer.tcc
+++ b/source/adios2/toolkit/format/bp/bp4/BP4Serializer.tcc
@@ -624,6 +624,8 @@ void BP4Serializer::PutBoundsRecord(const bool singleValue,
                     static_cast<uint64_t>(stats.SubBlockInfo.SubBlockSize);
                 helper::InsertToBuffer(buffer, &subBlockSize);
 
+                const uint16_t N =
+                    static_cast<uint16_t>(stats.SubBlockInfo.Div.size());
                 for (auto const d : stats.SubBlockInfo.Div)
                 {
                     helper::InsertToBuffer(buffer, &d);
@@ -676,6 +678,8 @@ void BP4Serializer::PutBoundsRecord(const bool singleValue,
                     static_cast<uint64_t>(stats.SubBlockInfo.SubBlockSize);
                 helper::CopyToBuffer(buffer, position, &subBlockSize);
 
+                const uint16_t N =
+                    static_cast<uint16_t>(stats.SubBlockInfo.Div.size());
                 for (auto const d : stats.SubBlockInfo.Div)
                 {
                     helper::CopyToBuffer(buffer, position, &d);