# Documentation went missing **URL:** \ **Category:** Users/Site Administrators\ **Created:** [June 21, 2022, 2:08pm UTC](https://community.openpbs.org/t/documentation-went-missing/3148 "2022-06-21T14:08:29Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![rollmops](https://avatars.discourse-cdn.com/v4/letter/r/f08c70/32.png) [@rollmops](https://community.openpbs.org/u/rollmops)\ **Post date:** [June 21, 2022, 2:08pm UTC](https://community.openpbs.org/t/documentation-went-missing/3148/1 "2022-06-21T14:08:29Z")
Dear OpenPBS team, clicking my bookmark for the PBS Admin Guide today, I could not load it anymore, instead I’m shown a 404 error page: [https://www.altair.com/docs/default-source/pdfs/pbsworks/PBSAdminGuide2021.1.pdf](https://www.altair.com/docs/default-source/pdfs/pbsworks/PBSAdminGuide2021.1.pdf) Luckily, I could find another, working, link via google ([here](https://2021.help.altair.com/2021.1.2/PBS%20Professional/PBSAdminGuide2021.1.2.pdf)), but when following links inside this PDF, I get a 404 error again, for the [PBS Professional Reference Guide](https://2021.help.altair.com/2021.1.2/PBS%20Professional/PBS2021.1.1.pdf#M59.9.10350.PBSHeading1.52.Server.Attributes) (see chapter 8.2.2.2.ii for reference). Were they deleted by mistake? Where can I find those documents? Thanks! ---
**Author:** ![rollmops](https://avatars.discourse-cdn.com/v4/letter/r/f08c70/32.png) [@rollmops](https://community.openpbs.org/u/rollmops)\ **Post date:** [June 21, 2022, 2:25pm UTC](https://community.openpbs.org/t/documentation-went-missing/3148/2 "2022-06-21T14:25:26Z")
okay nvm, found them here: [Altair Product Documentation - Altair Community](https://community.altair.com/community?id=altair_product_documentation), chose Product: PBS Professional, and whatever version you got running. Cheers! _Edit_: Links inside the PDFs are still broken, since they link to the old link structure.