diff --git a/rustdf/src/data/meta.rs b/rustdf/src/data/meta.rs
index 55f1a218..eb407bc1 100644
--- a/rustdf/src/data/meta.rs
+++ b/rustdf/src/data/meta.rs
@@ -3,12 +3,36 @@ extern crate rusqlite;
 use rusqlite::{Connection, Result};
 use std::path::Path;
 
+#[derive(Debug, Clone)]
+pub struct PasefMsMsMeta {
+    pub frame_id: i64,
+    pub scan_num_begin: i64,
+    pub scan_num_end: i64,
+    pub isolation_mz: f64,
+    pub isolation_width: f64,
+    pub collision_energy: f64,
+    pub precursor_id: i64,
+}
+
+#[derive(Debug, Clone)]
+pub struct DDAPrecursorMeta {
+    pub precursor_id: i64,
+    pub precursor_mz_highest_intensity: f64,
+    pub precursor_mz_average: f64,
+    pub precursor_mz_monoisotopic: Option<f64>,
+    pub precursor_charge: Option<u32>,
+    pub precursor_average_scan_number: f64,
+    pub precursor_total_intensity: f64,
+    pub precursor_frame_id: i64,
+}
+
+#[derive(Debug, Clone)]
 pub struct DDAPrecursorInfo {
     pub precursor_id: i64,
     pub precursor_mz_highest_intensity: f64,
     pub precursor_mz_average: f64,
-    pub precursor_mz_monoisotopic: f64,
-    pub precursor_charge: i64,
+    pub precursor_mz_monoisotopic: Option<f64>,
+    pub precursor_charge: Option<i64>,
     pub precursor_average_scan_number: f64,
     pub precursor_total_intensity: f64,
     pub precursor_frame_id: i64,
@@ -75,6 +99,58 @@ struct GlobalMetaInternal {
     value: String,
 }
 
+pub fn read_dda_precursor_info(bruker_d_folder_name: &str) -> Result<Vec<DDAPrecursorInfo>, Box<dyn std::error::Error>> {
+    // Connect to the database
+    let db_path = Path::new(bruker_d_folder_name).join("analysis.tdf");
+    let conn = Connection::open(db_path)?;
+
+    // prepare the query
+    let rows: Vec<&str> = vec!["Id", "LargestPeakMz", "AverageMz", "MonoisotopicMz", "Charge", "ScanNumber", "Intensity", "Parent"];
+    let query = format!("SELECT {} FROM Precursors", rows.join(", "));
+
+    // execute the query
+    let frames_rows: Result<Vec<DDAPrecursorInfo>, _> = conn.prepare(&query)?.query_map([], |row| {
+        Ok(DDAPrecursorInfo {
+            precursor_id: row.get(0)?,
+            precursor_mz_highest_intensity: row.get(1)?,
+            precursor_mz_average: row.get(2)?,
+            precursor_mz_monoisotopic: row.get(3)?,  // Now using Option<f64>
+            precursor_charge: row.get(4)?,           // Now using Option<i64>
+            precursor_average_scan_number: row.get(5)?,
+            precursor_total_intensity: row.get(6)?,
+            precursor_frame_id: row.get(7)?,
+        })
+    })?.collect();
+
+    // return the frames
+    Ok(frames_rows?)
+}
+
+pub fn read_pasef_frame_ms_ms_info(bruker_d_folder_name: &str) -> Result<Vec<PasefMsMsMeta>, Box<dyn std::error::Error>> {
+    // Connect to the database
+    let db_path = Path::new(bruker_d_folder_name).join("analysis.tdf");
+    let conn = Connection::open(db_path)?;
+
+    // prepare the query
+    let rows: Vec<&str> = vec!["Frame", "ScanNumBegin", "ScanNumEnd", "IsolationMz", "IsolationWidth", "CollisionEnergy", "Precursor"];
+    let query = format!("SELECT {} FROM PasefFrameMsMsInfo", rows.join(", "));
+
+    // execute the query
+    let frames_rows: Result<Vec<PasefMsMsMeta>, _> = conn.prepare(&query)?.query_map([], |row| {
+        Ok(PasefMsMsMeta {
+        frame_id: row.get(0)?,
+        scan_num_begin: row.get(1)?,
+        scan_num_end: row.get(2)?,
+        isolation_mz: row.get(3)?,
+        isolation_width: row.get(4)?,
+        collision_energy: row.get(5)?,
+        precursor_id: row.get(6)?, })
+        })?.collect();
+
+    // return the frames
+    Ok(frames_rows?)
+}
+
 // Read the global meta data from the analysis.tdf file
 pub fn read_global_meta_sql(bruker_d_folder_name: &str) -> Result<GlobalMetaData, Box<dyn std::error::Error>> {
 
diff --git a/rustdf/src/main.rs b/rustdf/src/main.rs
index 7a766266..3b349776 100644
--- a/rustdf/src/main.rs
+++ b/rustdf/src/main.rs
@@ -1,49 +1,21 @@
-// use rustdf::data::handle::TimsDataHandle;
 use std::env;
-use std::path::Path;
-use rusqlite::{Connection, Result};
-use rustdf::data::meta::{FrameMeta};
+use rustdf::data::meta::{read_dda_precursor_info};
 
-fn main() -> Result<()> {
+
+fn main() {
     let _args: Vec<String> = env::args().collect();
 
     let data_path = "/media/hd01/CCSPred/M210115_001_Slot1-1_1_850.d";
-    // Connect to the database
-    let db_path = Path::new(data_path).join("analysis.tdf");
-    let conn = Connection::open(db_path)?;
-
-    // prepare the query
-    let rows: Vec<&str> = vec!["Id", "Time", "ScanMode", "Polarity", "MsMsType", "TimsId", "MaxIntensity", "SummedIntensities",
-                               "NumScans", "NumPeaks", "MzCalibration", "T1", "T2", "TimsCalibration", "PropertyGroup", "AccumulationTime", "RampTime"];
-    let query = format!("SELECT {} FROM Frames", rows.join(", "));
 
-    // execute the query
-    let frames_rows: Result<Vec<FrameMeta>, _> = conn.prepare(&query)?.query_map([], |row| {
-        Ok(FrameMeta {
-            id: row.get(0)?,
-            time: row.get(1)?,
-            scan_mode: row.get(2)?,
-            polarity: row.get(3)?,
-            ms_ms_type: row.get(4)?,
-            tims_id: row.get(5)?,
-            max_intensity: row.get(6)?,
-            sum_intensity: row.get(7)?,
-            num_scans: row.get(8)?,
-            num_peaks: row.get(9)?,
-            mz_calibration: row.get(10)?,
-            t_1: row.get(11)?,
-            t_2: row.get(12)?,
-            tims_calibration: row.get(13)?,
-            property_group: row.get(14)?,
-            accumulation_time: row.get(15)?,
-            ramp_time: row.get(16)?,
-        })
-    })?.collect();
+    let result = read_dda_precursor_info(data_path);
 
-    for row in frames_rows? {
-        println!("FrameMeta: {:?}", row);
+    match result {
+        Ok(precursors) => {
+            println!("Precursors: {:?}", precursors);
+        },
+        Err(e) => {
+            println!("Error: {:?}", e);
+        }
     }
 
-    // return the frames
-    Ok(())
 }