# Access violation on connecting to Postgres database

**URL:** <https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676>\
**Category:** Toad Data Modeler\
**Created:** [May 15, 2026, 11:12am UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676 "2026-05-15T11:12:33Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![kai.quale](https://avatars.discourse-cdn.com/v4/letter/k/dc4da7/32.png) [@kai.quale](https://forums.toadworld.com/u/kai.quale)\
**Post date:** [May 15, 2026, 11:12am UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676/1 "2026-05-15T11:12:33Z")

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I'm trying to connect to a Postgres database, but I get the following error:

"Access violation at address 00000000004148D5 in module 'TDM.exe'. Read of address 0000000000000018".

I'm using TDM 8.0 with SSL Mode = Prefer and CA File = a downloaded `global-bundle.pem`. Earlier, I got an error on missing `libeay32.dll` and `ssleay32.dll`, and was advised to download the `.pem` and use it for CA File.

I may be on the wrong track here, but an access violation is by definition a bug - right?

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**Author:** ![Gita.Sharifi](https://sea1.discourse-cdn.com/quest/user_avatar/forums.toadworld.com/gita.sharifi/32/16973_2.png) [@Gita.Sharifi](https://forums.toadworld.com/u/Gita.Sharifi)\
**Post date:** [May 19, 2026, 2:50pm UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676/2 "2026-05-19T14:50:26Z")

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Hi Kai,

I haven't see that type error during Postgres connection. What version of Postgres are you trying to connect to?

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<div class="post-metadata">

**Author:** ![kai.quale](https://avatars.discourse-cdn.com/v4/letter/k/dc4da7/32.png) [@kai.quale](https://forums.toadworld.com/u/kai.quale)\
**Post date:** [May 22, 2026, 10:19am UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676/3 "2026-05-22T10:19:56Z")

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It's version 18.

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**Author:** ![kai.quale](https://avatars.discourse-cdn.com/v4/letter/k/dc4da7/32.png) [@kai.quale](https://forums.toadworld.com/u/kai.quale)\
**Post date:** [August 7, 2026, 10:46am UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676/4 "2026-08-07T10:46:45Z")

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Hi, is there any progress on this?

Do I need to input all three SSL fields (CA File, CERT File and Key File)? From where do I get these files?

Is it incorrect to input the downloaded `global-bundle.pem` I was advised to?

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<div class="post-metadata">

**Author:** ![kai.quale](https://avatars.discourse-cdn.com/v4/letter/k/dc4da7/32.png) [@kai.quale](https://forums.toadworld.com/u/kai.quale)\
**Post date:** [August 7, 2026, 10:53am UTC](https://forums.toadworld.com/t/access-violation-on-connecting-to-postgres-database/61676/5 "2026-08-07T10:53:22Z")

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By the way, is it correct that TDM is nearing end-of-life and one should transition to Erwin or QDM? In that case, it doesn't seem worth the effort to continue this issue.