Prep 2018.2.3 (since Sept '18)
Created a flow in Dec 2018, use it weekly. Used 12/17, saved, no issues. Used it 12/24, saved, no issues.
Went to open flow 12/31 and received the following error message:
"This file was created in a pre-release version of Tableau Prep and has a file format that is no longer valid in the released versions of Tableau Prep"
Prep will not open the file - just tested another file i used (and saved) 12/24 and am receiving same error.
Have any of you experienced this issue?
Any word from Tableau on what the issue/cause is?
I have opened a ticket Case# 04479996 in hopes of finding a remedy and/or preventative steps for future.
Support asked me to clear logs, duplicate, and send them fresh logs, which i have.
(Update: worked with support, issue was corrupted flow during a save (see network drive comments below) - issue was resolved by using Microsoft "Recover Previous Versions" capabilities - was not able to resolve via repackaging - has not been a frequent issue)
Quick update- It looks like in some scenarios, specifically when you are using a version of Prep that is valid, and has previously opened this file, and the file is saved on your local computer, You may be able to resolve this issue by Using 7.zip to extract the flow folder, and then re-zip the folder, changing the extension back to .tfl. It looks like this has fixed a few scenarios. However, It looks like when the file is being kept on a shared drive, this is less likely to work, as the corruption is likely to be caused by a "blip" in the network while saving. Network drives are known for causing similar issues, and it's not something Tableau would be able to fix, as it's all about how the operating system and network handle the file transfer.
If you are saving your flow to a shared/network drive, Please keep a local copy as well so that you have a backup if something like this occurs! Hopefully that helps someone!
