diff --git a/icartt/dataset.py b/icartt/dataset.py
index bdd9e9c87fce08c7c8fa947e3fcb930e46f2cf54..a3bd702cc9e366721373cec267efa42c05702dc0 100644
--- a/icartt/dataset.py
+++ b/icartt/dataset.py
@@ -85,6 +85,8 @@ class Dataset:
         prnt("{:d}".format(self.nncom))
         # Normal comments (SUPPORTING information: This is the place for investigators to more completely describe the data and measurement parameters. The supporting information structure is described below as a list of key word: value pairs. Specifically include here information on the platform used, the geo-location of data, measurement technique, and data revision comments. Note the non-optional information regarding uncertainty, the upper limit of detection (ULOD) and the lower limit of detection (LLOD) for each measured variable. The ULOD and LLOD are the values, in the same units as the measurements that correspond to the flags -7777s and -8888s within the data, respectively. The last line of this section should contain all the short variable names on one line. The key words in this section are written in BOLD below and must appear in this section of the header along with the relevant data listed after the colon. For key words where information is not needed or applicable, simply enter N/A.).
         nul = [ prnt(x) for x in self.NCOM ]
+        # data!
+        nul = [ prnt(",".join(x)) for x in self.data ]
 
 
     def __init__(self):