diff --git a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaForm.cxx b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaForm.cxx
index 1eaca976163..884cfec956a 100644
--- a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaForm.cxx
+++ b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaForm.cxx
@@ -591,8 +591,6 @@ MetaForm::ReadStream(METAIO_STREAM::ifstream * _stream)
 
   MetaForm::M_Destroy();
 
-  fflush(nullptr);
-
   Clear();
 
   M_SetupReadFields();
diff --git a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaObject.cxx b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaObject.cxx
index f0f36b9d5b3..0ca694a9da6 100644
--- a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaObject.cxx
+++ b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaObject.cxx
@@ -357,8 +357,6 @@ MetaObject::ReadStream(int _nDims, METAIO_STREAM::ifstream * _stream)
 
   MetaObject::M_Destroy();
 
-  fflush(nullptr);
-
   Clear();
 
   M_SetupReadFields();
diff --git a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaUtils.cxx b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaUtils.cxx
index 2244c819e37..e37635bf36a 100644
--- a/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaUtils.cxx
+++ b/Modules/ThirdParty/MetaIO/src/MetaIO/src/metaUtils.cxx
@@ -891,6 +891,12 @@ MET_PerformUncompression(const unsigned char * sourceCompressed,
     } while (d_stream.avail_out == 0);
   } while (err != Z_STREAM_END && err >= 0);
   inflateEnd(&d_stream);
+  if (err != Z_STREAM_END)
+  {
+    std::cerr << "MET_PerformUncompression: compressed stream did not terminate cleanly (zlib error " << err << ")"
+              << '\n';
+    return false;
+  }
   if (dest_pos != uncompressedDataSize)
   {
     std::cerr << "MET_PerformUncompression: expected " << uncompressedDataSize << " bytes, produced " << dest_pos