# Upgrade from 16 to 18 broke system

**URL:** <https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427>\
**Category:** Installing my Dolibarr\
**Tags:** Issue\
**Created:** [October 17, 2023, 5:07pm UTC](https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427 "2023-10-17T17:07:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Pentangle](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/p/a6a055/32.png) [@Pentangle](https://www.dolibarr.org/forum/u/Pentangle)\
**Post date:** [October 17, 2023, 5:07pm UTC](https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427/1 "2023-10-17T17:07:29Z")

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I ran the install /upgrade stage by stage, and ended up with a white screen.  
Now all I get is database access errors.  
**Message:** host=localhost, port=3306, user=dolibarrdebian, databasename=dolibarrdebian, Failed to connect

Unable to reinstall 16 on spare system as php 7 no longer available.  
Unable to import database as instructions say to use same version as old system (bad)

Any suggestions please

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**Author:** ![jonbendtsen](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jonbendtsen](https://www.dolibarr.org/forum/u/jonbendtsen)\
**Post date:** [October 17, 2023, 6:32pm UTC](https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427/2 "2023-10-17T18:32:26Z")

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have you tried connecting to the database outside Dolibarr using exactly the same methods?

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**Author:** ![Pentangle](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/p/a6a055/32.png) [@Pentangle](https://www.dolibarr.org/forum/u/Pentangle)\
**Post date:** [October 18, 2023, 7:22am UTC](https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427/3 "2023-10-18T07:22:10Z")

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Yes using MySQL Workbench. BUT with different user name, which has limited rights

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**Author:** ![jonbendtsen](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jonbendtsen](https://www.dolibarr.org/forum/u/jonbendtsen)\
**Post date:** [October 18, 2023, 7:38pm UTC](https://www.dolibarr.org/forum/t/upgrade-from-16-to-18-broke-system/24427/4 "2023-10-18T19:38:09Z")

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try with the same user