diff --git a/Source/Riff/Riff_Chunks_AVI__Tdat_rn_A.cpp b/Source/Riff/Riff_Chunks_AVI__Tdat_rn_A.cpp
index d145967..31788c6 100755
--- a/Source/Riff/Riff_Chunks_AVI__Tdat_rn_A.cpp
+++ b/Source/Riff/Riff_Chunks_AVI__Tdat_rn_A.cpp
@@ -20,7 +20,7 @@
 void Riff_AVI__Tdat_rn_A::Read_Internal ()
 {
     //Integrity
-    if (Global->iXML)
+    if (Global->Tdat->Strings.find("rn_a")!=Global->Tdat->Strings.end())
         throw exception_valid("2 rn_A chunks");
 
     //Reading
diff --git a/Source/Riff/Riff_Chunks_AVI__Tdat_rn_O.cpp b/Source/Riff/Riff_Chunks_AVI__Tdat_rn_O.cpp
index 6af8b1b..380b785 100755
--- a/Source/Riff/Riff_Chunks_AVI__Tdat_rn_O.cpp
+++ b/Source/Riff/Riff_Chunks_AVI__Tdat_rn_O.cpp
@@ -20,7 +20,7 @@
 void Riff_AVI__Tdat_rn_O::Read_Internal ()
 {
     //Integrity
-    if (Global->iXML)
+    if (Global->Tdat->Strings.find("rn_O")!=Global->Tdat->Strings.end())
         throw exception_valid("2 rn_O chunks");
 
     //Reading
diff --git a/Source/Riff/Riff_Chunks_AVI__Tdat_tc_A.cpp b/Source/Riff/Riff_Chunks_AVI__Tdat_tc_A.cpp
index 6785b6c..b956170 100755
--- a/Source/Riff/Riff_Chunks_AVI__Tdat_tc_A.cpp
+++ b/Source/Riff/Riff_Chunks_AVI__Tdat_tc_A.cpp
@@ -20,7 +20,7 @@
 void Riff_AVI__Tdat_tc_A::Read_Internal ()
 {
     //Integrity
-    if (Global->iXML)
+    if (Global->Tdat->Strings.find("tc_A")!=Global->Tdat->Strings.end())
         throw exception_valid("2 tc_A chunks");
 
     //Reading
diff --git a/Source/Riff/Riff_Chunks_AVI__Tdat_tc_O.cpp b/Source/Riff/Riff_Chunks_AVI__Tdat_tc_O.cpp
index d9b01a4..40d467a 100755
--- a/Source/Riff/Riff_Chunks_AVI__Tdat_tc_O.cpp
+++ b/Source/Riff/Riff_Chunks_AVI__Tdat_tc_O.cpp
@@ -20,7 +20,7 @@
 void Riff_AVI__Tdat_tc_O::Read_Internal ()
 {
     //Integrity
-    if (Global->iXML)
+    if (Global->Tdat->Strings.find("tc_O")!=Global->Tdat->Strings.end())
         throw exception_valid("2 tc_O chunks");
 
     //Reading