# How to see if dataset is undefined **URL:** \ **Category:** Ignition\ **Created:** [June 23, 2015, 3:51pm UTC](https://forum.inductiveautomation.com/t/how-to-see-if-dataset-is-undefined/10163 "2015-06-23T15:51:44Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ovendenk](https://avatars.discourse-cdn.com/v4/letter/o/f14d63/32.png) [@ovendenk](https://forum.inductiveautomation.com/u/ovendenk)\ **Post date:** [June 23, 2015, 3:51pm UTC](https://forum.inductiveautomation.com/t/how-to-see-if-dataset-is-undefined/10163/1 "2015-06-23T15:51:44Z")
I’m working with the alarm status table and created a button that looks at the selected alarm and displays the OPC item path for that alarm. I have IF statements using selectedAlarms.rowcount to make sure only 1 row is selected. Problem is that until an alarm is selected, the selectedAlarms dataset says . That means it throws an error saying: ‘NoneType’ object has no attribute ‘rowCount’ Is there a way to script it to see if selectedAlarms is set to ?? Thanks in advance ---
**Author:** ![dave.fogle](https://avatars.discourse-cdn.com/v4/letter/d/43a26b/32.png) [@dave.fogle](https://forum.inductiveautomation.com/u/dave.fogle)\ **Post date:** [June 23, 2015, 4:52pm UTC](https://forum.inductiveautomation.com/t/how-to-see-if-dataset-is-undefined/10163/2 "2015-06-23T16:52:48Z")
You can just write an if statement that checks to see if the selectedAlarms == None. It will return true in the situation you're talking about. ---
**Author:** ![ovendenk](https://avatars.discourse-cdn.com/v4/letter/o/f14d63/32.png) [@ovendenk](https://forum.inductiveautomation.com/u/ovendenk)\ **Post date:** [June 23, 2015, 5:25pm UTC](https://forum.inductiveautomation.com/t/how-to-see-if-dataset-is-undefined/10163/3 "2015-06-23T17:25:15Z")
Thank you. I’m an idiot, lol. Not sure why I didn’t think of that