diff --git a/src/omniperf b/src/omniperf
index 0b1119b822..cbff84634b 100755
--- a/src/omniperf
+++ b/src/omniperf
@@ -30,6 +30,7 @@ import glob
 import pandas as pd
 from datetime import datetime
 from pathlib import Path as path
+import warnings
 
 from parser import parse
 from utils import specs
@@ -115,11 +116,14 @@ def isWorkloadEmpty(my_parser, path):
 
 def replace_timestamps(workload_dir):
     df_stamps = pd.read_csv(workload_dir + "/timestamps.csv")
-    df_pmc_perf = pd.read_csv(workload_dir + "/pmc_perf.csv")
+    if "BeginNs" in df_stamps.columns and "EndNs" in df_stamps.columns:
+        df_pmc_perf = pd.read_csv(workload_dir + "/pmc_perf.csv")
 
-    df_pmc_perf["BeginNs"] = df_stamps["BeginNs"]
-    df_pmc_perf["EndNs"] = df_stamps["EndNs"]
-    df_pmc_perf.to_csv(workload_dir + "/pmc_perf.csv", index=False)
+        df_pmc_perf["BeginNs"] = df_stamps["BeginNs"]
+        df_pmc_perf["EndNs"] = df_stamps["EndNs"]
+        df_pmc_perf.to_csv(workload_dir + "/pmc_perf.csv", index=False)
+    else:
+        warnings.warn("WARNING: Incomplete profiling data detected. Unable to update timestamps.")
 
 
 def gen_sysinfo(workload_name, workload_dir, ip_blocks, app_cmd, skip_roof):