Clarify custom error page placement for Atlas 2 (Mendix 9) apps#11465
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The custom error page how-to only documented the Atlas 3 location (theme/web/error_page). Atlas 2 apps treat the entire theme folder as the web root, so following the Atlas 3 path nests the error_page folder one level too deep and the pages are never served. Add the same Atlas 2 note already present in the Studio Pro 9 (howto9) version to the current and Studio Pro 10 (howto10) versions, directing Atlas 2 users to place error_page in the theme folder directly (or upgrade to Atlas 3). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Reword the Atlas 2 note so it reads as guidance for readers who land on the page regardless of their version. Atlas 2 only applies to supported Mendix 9 apps still on Atlas 2 (Mendix 10 and 11 use Atlas 3+), so the note now states this explicitly rather than implying Atlas 2 is a general option. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Yornik
changed the title
ConnorLand
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Jul 3, 2026
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What
Adds a clarifying note to the Create Custom Error Pages how-to about folder placement for apps still on Atlas 2.
Why
The how-to documents only the Atlas 3 location for the error page (
theme/web/error_page). In Atlas 2 the entirethemefolder is the web root, so following the Atlas 3 path nests theerror_pagefolder one level too deep in the deployment package — the custom error pages are never served and users keep seeing the default Mendix error page.Because the unversioned how-to is where search typically lands readers regardless of their Mendix version, the note helps a supported Mendix 9 / Atlas 2 reader who arrives here. Atlas 2 applies only to Mendix 9 apps still on Atlas 2 (Mendix 10 and 11 use Atlas 3+), and the note states this explicitly.
Change
Adds the note to:
content/en/docs/howto/front-end/custom-error-page.md(current / Mendix 11)content/en/docs/howto10/front-end/custom-error-page.md(Mendix 10)The Studio Pro 9 version (
howto9) already documents the Atlas 2 case, and the Mendix 8 version (howto8) already instructs placingerror_pagedirectly intheme, so neither needs a change. The migration link reuses the existing/refguide9/moving-from-atlas-2-to-3/reference.