Well this is certainly strange. Before you do any further troubleshooting, I'd suggest upgrading to the latest version. They've made tons of fixes and enhancements so it's possible that this will just go away when you upgrade.
As Ken mentions, it is worth updating to the the latest version to get the benefit of the most up to date fixes & features
Version 2019.1.4 was just released there on 2nd Apr...
1 of 1 people found this helpful
One thing to double check is that the hyper extract is not in use by Tableau Desktop. If you are connected to the hyper file in an open instance of Tableau Desktop, Tableau Prep will not be able to write to it. It is also possible that the hyper engine has locked the file and failed to release it for some reason. Try shutting down all instances of Tableau Prep and Desktop (saving your work) and then go into Task Manager and kill everything that looks like hyperd.exe or Tableau Prep Builder.exe or tableau.exe (or simply reboot). Then start Tableau Prep again and see if you can run the flow.
Hope that helps!
Ken, many thanks for the response. I wish I could follow your suggestion but unfortunately I'm operating in a corporate environment and things here move at corporate speed (otherwise known as a snail's pace). Our Tableau Desktop and Server are still at 2018.2 and we're locked into the corporate standard. I'll work with our Tableau admin people and see if I can get an exception on the upgrade.
I really appreciate your suggestions but so far no luck. I've verified there are no open instances of Desktop and after I close Tableau Prep Windows is not holding onto instances of it. What I did notice, looking in the Task Manager when Tableau Prep is open, is that there appear to be multiple instances of Tableau Prep. I don't know if this is normal or not:
There is also a single instance of hyperd.exe and hyperdstarter.exe. I'll try uninstalling and reinstalling Prep to see if that works. If not I guess I'll just have to lean on our Tableau admin guys to speed up the upgrade schedule.
(fyi, the TWB in the screenshot is my initials - I was obviously destined for Tableau!)
Many thanks for your help,
Ah yes, I understand that. If it helps, there are no real dependencies for Tableau Prep. The extracts you create within 2019.2, for instance, will work with Desktop or Server 2018.2.
In addition, you may want to consider opening a support case with Tableau, if you have not already.