Traceback (most recent call last): File "sunmoondata.py", line 200, in my_chart_dat = cf_util.getChartDat(chart_key) File "cgilib/cf_util.py", line 66, in getChartDat command = "cat "+chart_data_path +"| grep -e '^"+chart_key+"|'" TypeError: cannot concatenate 'str' and 'NoneType' objects