# Deleted old version of Toad for Oracle (12.5) and current version (12.6) stopped working...

**URL:** <https://forums.toadworld.com/t/deleted-old-version-of-toad-for-oracle-12-5-and-current-version-12-6-stopped-working/33382>\
**Category:** Toad for Oracle & DevOps Toolkit\
**Created:** [May 29, 2015, 8:10am UTC](https://forums.toadworld.com/t/deleted-old-version-of-toad-for-oracle-12-5-and-current-version-12-6-stopped-working/33382 "2015-05-29T08:10:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Anonymous1](https://avatars.discourse-cdn.com/v4/letter/a/77aa72/32.png) [@Anonymous1](https://forums.toadworld.com/u/Anonymous1)\
**Post date:** [May 29, 2015, 8:10am UTC](https://forums.toadworld.com/t/deleted-old-version-of-toad-for-oracle-12-5-and-current-version-12-6-stopped-working/33382/1 "2015-05-29T08:10:43Z")

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Hi Guys,

I was cleaning up my PC and decided to uninstall an earlier version of toad for oracle (v12.5) and now toad for oracle v 12.6 is giving me the following error

_ **"No valid Oracle clients found. you need at least one 64-bit client properly configured"** _

I have been using v12.6 with no issues for the last year so I know I have everything I need in regards to the oracle client and system variables. has this happened to anyone before?

Any help would be greatly appreciated

Thanks,

Neil