diff --git a/Cargo.toml b/Cargo.toml
index ee2e5d6..795f3a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "arrayify"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2024"
 
 [dependencies]
@@ -8,6 +8,7 @@ csv = "1.1"
 clap = { version = "4.0", features = ["derive"] }
 regex = "1"
 tempfile = "3.17.1"
+chrono = "0.4.40"
 
 [[bin]]
 name = "arrayify"
diff --git a/src/args.rs b/src/args.rs
index ef6dc9c..a2fb443 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -2,7 +2,7 @@ use clap::{Arg, ArgMatches, Command as ClapCommand};
 
 pub fn parse_args() -> ArgMatches {
     ClapCommand::new("arrayify")
-        .version("0.1.1")
+        .version("0.1.2")
         .author("Sam Dougan")
         .about("Submits and checks bsub job arrays from a CSV file")
         .subcommand_required(true)
diff --git a/src/main.rs b/src/main.rs
index 451fba3..a23affe 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,7 @@ use regex::Regex;
 use std::fs::{self, File};
 use std::io::{self, Write};
 use std::process::Command;
+use chrono::Local;
 
 #[derive(Subcommand)]
 enum SubCommands {
@@ -41,6 +42,11 @@ fn read_jobs_from_csv(csv_file: &str, command_template: &str) -> io::Result<Vec<
     Ok(jobs)
 }
 
+fn count_lines_in_file(file_path: &str) -> io::Result<usize> {
+    let content = std::fs::read_to_string(file_path)?;
+    Ok(content.lines().count())
+}
+
 fn calculate_batch_size(num_jobs: usize, batch_size: Option<usize>) -> usize {
     batch_size.unwrap_or_else(|| {
         let calculated = ((num_jobs as f64) * 0.2).ceil() as usize;
@@ -48,33 +54,37 @@ fn calculate_batch_size(num_jobs: usize, batch_size: Option<usize>) -> usize {
     })
 }
 
-fn submit_jobs_to_scheduler(jobs: &[String], log_dir: &str, memory_mb: u32, threads: u32, batch_size: usize) -> io::Result<String> {
-    let num_jobs = jobs.len();
+fn submit_jobs_to_scheduler(job_file_path: &str, log_dir: &str, memory_mb: u32, threads: u32, batch_size: usize) -> io::Result<String> {
+    // Count the number of lines in the file to determine the job array size
+    let num_jobs = count_lines_in_file(job_file_path)?;
     let job_array = format!("arrayify_job_array[1-{}]%{}", num_jobs, batch_size);
     let output_log = format!("{}/job_%J_%I.out", log_dir);
     let error_log = format!("{}/job_%J_%I.err", log_dir);
 
+    // Generate the bsub command
     let bsub_cmd = format!(
         "bsub -J {} -n {} -M {} -R \"select[mem>{}] rusage[mem={}]\" -o {} -e {}",
         job_array, threads, memory_mb, memory_mb, memory_mb, output_log, error_log
     );
 
-    let mut script = String::new();
-    script.push_str("#!/bin/bash\n\nINDEX=$((LSB_JOBINDEX - 1))\n\n");
-    script.push_str("JOBS=(");
-    for job in jobs {
-        script.push_str(&format!("\"{}\" ", job));
-    }
-    script.push_str(")\n\n");
+    // Generate the script that uses `sed` to extract the job command from the file
+    let script = format!(
+        r#"#!/bin/bash
 
-    script.push_str("COMMAND=${JOBS[$INDEX]}\n");
-    script.push_str("$COMMAND\n");
+INDEX=$((LSB_JOBINDEX - 1))
+COMMAND=$(sed -n "$((INDEX + 1))p" {})
+$COMMAND
+"#,
+        job_file_path
+    );
 
+    // Submit the job using the bsub command
     let child = Command::new("bash")
         .arg("-c")
         .arg(format!("echo '{}' | {}", script, bsub_cmd))
         .output()?;
 
+    // Extract the job ID from the bsub output
     let bsub_output = String::from_utf8_lossy(&child.stdout);
     let re = Regex::new(r"Job <(\d+)>").unwrap();
     let job_id = re
@@ -88,8 +98,8 @@ fn submit_jobs_to_scheduler(jobs: &[String], log_dir: &str, memory_mb: u32, thre
 
 fn write_job_log(log_file_path: &str, jobs: &[String]) -> io::Result<()> {
     let mut log_file = File::create(log_file_path)?;
-    for (index, job_command) in jobs.iter().enumerate() {
-        writeln!(log_file, "[{}] {}", index + 1, job_command)?;
+    for job_command in jobs.iter() {
+        writeln!(log_file, "{}", job_command)?;
     }
     Ok(())
 }
@@ -111,12 +121,13 @@ pub fn submit_jobs(
         return Ok(());
     }
 
-    let batch_size = calculate_batch_size(jobs.len(), batch_size);
-    let job_id = submit_jobs_to_scheduler(&jobs, log_dir, memory_mb, threads, batch_size)?;
-
-    let log_file_path = format!("{}/arrayify-{}.log", log_dir, job_id);
+    let timestamp = Local::now().format("%Y-%m-%d-%H-%M").to_string();
+    let log_file_path = format!("{}/arrayify-{}.log", log_dir, timestamp);
     write_job_log(&log_file_path, &jobs)?;
 
+    let batch_size = calculate_batch_size(jobs.len(), batch_size);
+    let job_id = submit_jobs_to_scheduler(&log_file_path, log_dir, memory_mb, threads, batch_size)?;
+
     print_run_stats(jobs.len(), log_dir, log_file_path, &job_id);
     Ok(())
 }
@@ -284,8 +295,8 @@ mod tests {
         write_job_log(log_file.path().to_str().unwrap(), &jobs).unwrap();
 
         let contents = fs::read_to_string(log_file.path()).unwrap();
-        assert!(contents.contains("[1] job1"));
-        assert!(contents.contains("[2] job2"));
+        assert!(contents.contains("job1"));
+        assert!(contents.contains("job2"));
     }
 
     #[test]