That filename looks strange. The "%date:" substrings look like macros that didn't get expanded. You can't have a colon in a filename (that's reserved for the drive specification).
We did face the similar issue while exporting the site. The Main problem was if a user is deleted from a site The 9.0 version (don't remember in which it got fixed) their customized views still remain in the postgres data base and that cause problem as it cant find a relation to the deleted user.
If you have access to the Tableau postgres data and the below query should return the views which had issue.
SELECT * FROM customized_views
WHERE repository_thumbnail_data_id NOT IN (SELECT id FROM repository_data)
Identify the workbook which has issue , Download it take a backup and you need to delete the workbook from server , Later you can republish it back.
but, the same command works on a different site and a different server. So, not sure if the colon is an issue
I do want to export a site, not dealing with a particular workbook/issue. Just want to export as a whole
Yes even that's what I am trying to say . Even if one workbook has a issue in that site , Tableau doesn't allow you to export the whole site and shows the error with some random numbers every time you export.
I have explained above was the solution offered by Tableau support to find the workbook which is causing the failure to export the site.
Let me know if you are not clear.
Ah!! I get it now.
Let me try this and will get back to you. Thanks