diff --git a/fishbook/data_import.py b/fishbook/data_import.py
index abe7103..d1d8200 100644
--- a/fishbook/data_import.py
+++ b/fishbook/data_import.py
@@ -1,25 +1,29 @@
 import argparse
 import glob
+import os
+
 
 main_descr = "Import data into the fishbook database!"
 
 
 def run(args):
+    datasets = sorted(glob.glob(os.path.join(args.folder, args.pattern)))
+    if len(datasets) < 1 and not args.drop:
+        print("no matching datasets found when using pattern %s" % os.path.join(args.folder, args.pattern))
+        exit()
+    
     import fishbook as fb
-
-    if args.Drop:
+    if args.drop:
         fb.backend.database.drop_tables()
         exit()
-    from IPython import embed
-    embed
-    datasets = sorted(glob.glob(os.path.join(args.folder, args.pattern)))
-    if len(datasets) > 0:
-        fb.backend.database.populate(datasets, args.update)
+    
+    fb.backend.database.populate(datasets, args.update)
+
     
 def main():
     parser = argparse.ArgumentParser(prog="fishbookImport", description=main_descr)
     parser.add_argument("folder", default=".", help="the location in which to look for datasets. Default is the current folder")
-    parser.add_argument("-p", "--pattern", type=str, default="20*", help="the dataset name pattern to apply")
+    parser.add_argument("-p", "--pattern", type=str, default="20*", help="the dataset name pattern to apply, e.g. \"2020-01-01-*\"")
     parser.add_argument("-u", "--update", default=False, action="store_true", help="update entries instead of skipping duplicates")
     parser.add_argument("--drop", default=False, action="store_true", help="Drop all information from the database")
     args = parser.parse_args()