diff --git a/src/error.rs b/src/error.rs
index f0b21e5..4fa54fc 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -67,6 +67,8 @@ pub enum TdmsError {
         "The calculated size for a data chunk is grater than 2^64 bytes. This isn't allowed and probably indicates a corrupt file."
     )]
     ChunkSizeOverflow,
+    #[error("DAQmx Channels are not supported yet")]
+    DaqmxChannelsNotSupported,
     #[cfg(feature = "chrono")]
     #[error("Failed to convert LVTime to chrono::DateTime")]
     ChronoDateTimeConversionFailed(#[source] labview_interop::types::timestamp::LVTimeError),
diff --git a/src/meta_data.rs b/src/meta_data.rs
index 58ed9f4..c6138c4 100644
--- a/src/meta_data.rs
+++ b/src/meta_data.rs
@@ -280,8 +280,8 @@ impl TdmsMetaData for RawDataIndex {
         let raw_data = match raw_index {
             0x0000_0000 => RawDataIndex::MatchPrevious,
             0xFFFF_FFFF => RawDataIndex::None,
-            0x69120000..=0x6912FFFF => todo!(), // daqmx 1
-            0x69130000..=0x6913FFFF => todo!(), //daqmx 2
+            0x69120000..=0x6912FFFF => return Err(TdmsError::DaqmxChannelsNotSupported), // daqmx 1
+            0x69130000..=0x6913FFFF => return Err(TdmsError::DaqmxChannelsNotSupported), //daqmx 2
             _ => {
                 let data_type: DataType = reader.read_meta()?;
                 let _array_dims: u32 = reader.read_value()?; //always 1.