# Subscribing to ValueChanged Events **URL:** \ **Category:** Developer Tools\ **Created:** [September 26, 2007, 11:21pm UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451 "2007-09-26T23:21:22Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 26, 2007, 11:21pm UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/1 "2007-09-26T23:21:22Z")
I am having difficulty with something that “should” be simple - probably something I have overlooked. I have written a FlexPendant App in C# using FlexPendant SDK/RAB 5.09/debugging with the Virtual FlexPendant. I am reading/writing RapidData values with no problem, however I cannot seem to get my RapidData “ValueChanged” event handlers to fire when the RapidData values are changed in the rapid code. No problem with my controller events firing - just RapidData “ValueChanged” events. Can someone help ? Thx ---
**Author:** ![RussD](https://avatars.discourse-cdn.com/v4/letter/r/dec6dc/32.png) [@RussD](https://tech-community.robotics.abb.com/u/RussD)\ **Post date:** [September 27, 2007, 12:22am UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/2 "2007-09-27T00:22:37Z")
This was a problem in RobotWare 5.09, aka 5.09.0166, that was fixed in 5.09.01, aka 5.09.1020. It only affected the Virtual IRC5. ---
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 27, 2007, 2:56am UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/3 "2007-09-27T02:56:24Z")
I am new to ABB products - not sure what Robotware is, but I am running Version 5.09.2188.166 of RobotStudio and the version of the FlexPendant SDK DLLs is 5.9.167 and I am debugging with the Virtual IRC5. If I am indeed using an older version, how to I get an update? Thx ---
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 27, 2007, 3:02am UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/4 "2007-09-27T03:02:06Z")
Spoke too soon in my last post - System properties of the my Virtual IRC5 tell me I am using RobotWare version RW6.09\_0166. I assume I can download an update. Thx ---
**Author:** ![RussD](https://avatars.discourse-cdn.com/v4/letter/r/dec6dc/32.png) [@RussD](https://tech-community.robotics.abb.com/u/RussD)\ **Post date:** [September 27, 2007, 4:53am UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/5 "2007-09-27T04:53:02Z")
Update-This should have said “your” local ABB support organization. You can contact **y** our local ABB support organization to get a download. One thing I forgot to mention is that you will only get ValueChanged events for PERS variables. ---
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 27, 2007, 5:39pm UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/6 "2007-09-27T17:39:25Z")
Thanks Russell - I will do that. Also, I am using PERS variables. Thx ---
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 29, 2007, 12:43pm UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/7 "2007-09-29T12:43:29Z")
I was able to download and install the latest RobotWare 5.09.1020, however the System Properties of the Virtual FlexPendant still indicate RW5.09\_0166. (and the problem still exists of course) Do I have to rebuild something? ---
**Author:** ![RussD](https://avatars.discourse-cdn.com/v4/letter/r/dec6dc/32.png) [@RussD](https://tech-community.robotics.abb.com/u/RussD)\ **Post date:** [September 29, 2007, 6:03pm UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/8 "2007-09-29T18:03:41Z")
Did you make a new robot system in Robot Studio using 5.09.01 and are using that one to test your application? ---
**Author:** ![rrtsan](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@rrtsan](https://tech-community.robotics.abb.com/u/rrtsan)\ **Post date:** [September 30, 2007, 3:48am UTC](https://tech-community.robotics.abb.com/t/subscribing-to-valuechanged-events/1451/9 "2007-09-30T03:48:49Z")
No, so I just made a new system in Robot Studio 6.09.01 and the version is now updated and the problem is fixed. Thank-you very much for your help.