Reference · 59 codes

Diagnostic codes

Every diagnostic has a stable code, a severity, and usually a line and column in the source HTML. Errors abort the import. Warnings are reported and the import continues. Info entries explain a decision the importer made. Agents and CI should key on the code, never on the message text.

59 / 59

HTML001WARNINGElement never closed; auto-closed at end of inputFIX ▸Close the tag

HTML002WARNINGEnd tag with no matching open element; ignoredFIX ▸Remove the stray end tag

HTML003INFOElement implicitly closed by an outer end tagFIX ▸Usually fine

HTML004WARNINGMalformed attributeFIX ▸Quote the value

HTML005WARNINGUnterminated commentFIX ▸Add -->

HTML006WARNINGUnterminated tag or declarationFIX ▸Fix the markup

HTML010WARNING / INFOscript ignored (info for the Tailwind CDN script and for scripts marked data-webumg-ignore, such as the preview fit-to-window scaler)FIX ▸Nothing; JavaScript is never converted

HTML011WARNINGExternal stylesheet not loaded: remote URL, file not found, or no source directory (in-memory lint)FIX ▸Ship the .css next to the HTML with a relative href, or move the rules into a <style> block

HTML013INFOExternal stylesheet loaded (its @imports spliced in)FIX ▸Nothing

HTML012WARNINGDuplicate idFIX ▸Make ids unique; only the first can be bound

HTML020ERRORNesting deeper than 256FIX ▸Flatten the design

CSS001WARNING / INFORule or at-rule could not be parsed and was skippedFIX ▸Check the syntax

CSS002WARNING@media block ignoredFIX ▸Use --viewport, or unconditional rules

CSS003WARNINGUnsupported selector (sibling combinators, pseudo-elements, :not(), :nth-*, nesting)FIX ▸Use class, id, descendant or child selectors

CSS004WARNING@import not loaded: remote URL, file not found, cyclic, or no source directoryFIX ▸Use a relative path to a file next to the stylesheet, or inline the rules

CSS005INFO@keyframes ignoredFIX ▸Animate in UMG

CSS006INFO@font-face with a local file registered for import, or without one ignoredFIX ▸Ship the font file next to the HTML, or install the family

CSS007WARNINGProperty not supportedFIX ▸See the support matrix

CSS008WARNINGValue could not be parsedFIX ▸Fix the value

CSS009INFONon-visual property ignored (transition, cursor, ...)FIX ▸Nothing

CSS010WARNINGvar() had no value and no fallback; declaration droppedFIX ▸Define it on :root or add a fallback

TW001WARNINGUnknown class: not a Tailwind utility and no stylesheet rule uses itFIX ▸Typo, custom color, or plugin class; define a rule or remove it

TW002INFOVariant not applicable at the design viewport/mode (max-*, print:, dark: when off)FIX ▸Nothing, or pass --dark / --viewport

TW003INFOUtility has no visual effect in UMG (transition-*, cursor-*, ring-*, ...)FIX ▸Nothing

MAP001INFOElement has no dedicated mapping; treated as a containerFIX ▸Usually fine

MAP002WARNINGdata-widget names an unknown classFIX ▸Use a class from the authoring guide

MAP003INFOImage recorded for importFIX ▸Nothing

MAP004INFOPercentage size approximated by a fill weightFIX ▸Use px or flex-1 for exact control

MAP005INFOGradient has more than three stops; rendered from its first, middle and last stopFIX ▸Split into two overlays if the other stops matter

MAP006INFObox-shadow ignoredFIX ▸Nothing

MAP007WARNINGWidget name collision resolved with a suffixFIX ▸Make ids unique

MAP008WARNINGId contained invalid characters and was sanitizedFIX ▸Use [A-Za-z0-9_]

MAP009WARNINGDuplicate data-bind or data-event nameFIX ▸Make names unique

MAP010INFOAbsolute children anchored to a non-positioned parentFIX ▸Add relative to the intended parent

MAP011INFOProgress bar produced from elementFIX ▸Nothing

MAP012INFOInline formatting flattened into one text blockFIX ▸Split into separate elements

MAP013INFOaspect-ratio with no px side to derive the other from; ignoredFIX ▸Give one side in px (the other follows), or both

MAP014INFOInline svg rasterized to a UI texture at 2x (T_<Name>_svg)FIX ▸Nothing; img src="x.svg" files are rasterized the same way (MAP023 lists what the rasterizer skips)

MAP015INFOjustify-content reproduced with spacer widgetsFIX ▸Nothing

MAP016INFOElement marked data-webumg-ignore skipped (preview-only)FIX ▸Nothing; intended for screenshots behind a HUD

MAP019INFOAbsolute element stretched between two edges with an auto size on the other axis, and no parent with a px box to resolve itFIX ▸Give it a px width or height, or give the parent a px box; otherwise UMG has no desired extent for it

MAP020INFOBorder on some sides only (border-b, border-l) drawn as thin edge lines in an _Edged overlayFIX ▸Nothing; a Slate outline is four-sided, the lines reproduce the CSS

MAP021INFOCSS transform (rotate, scale, px translate) mapped to the widget render transform; transform-origin (keywords, %, px, Tailwind origin-*) sets the pivotFIX ▸Nothing

MAP022INFOtransform-origin in px on an element without a px size on that axis; the centre is usedFIX ▸Give the element w-[px] h-[px], or use a keyword or percentage origin

MAP023INFOAn SVG feature the rasterizer does not draw: text, image, filter, mask, clipPath, pattern, marker, stroke-dasharray (drawn solid), or an unresolved url(#id) paintFIX ▸Convert text to paths in the design tool; bake filters and masks into the artwork

MAP018INFOAbsolute children that precede positioned (relative) flow content in the same parent are layered underneath it, in an _Underlay canvasFIX ▸Nothing; this is CSS paint order (frame image first, content after). Absolute children after the content, or above static content, stay in the _Canvas above

MAP017INFOCorner gradient direction (to bottom right, bg-gradient-to-br) on an element without fixed px width and height; a 45-degree diagonal is usedFIX ▸Give the element w-[px] h-[px], or use an explicit angle

EMIT001WARNING / ERRORA property could not be applied, or a widget class is unavailableFIX ▸Report it; the rest of the widget is still built

EMIT002WARNINGImage not found or texture import failedFIX ▸Check the path relative to the HTML

EMIT003ERRORAsset exists and was not created by this importerFIX ▸Rename the design, or pass --force

EMIT004WARNINGParent class not foundFIX ▸Check --parent

EMIT005INFOTypeface not on the font asset; Regular usedFIX ▸Use a font with Bold/Italic faces

EMIT006ERRORBlueprint compiled with errorsFIX ▸Open the asset; report the compiler message

EMIT007ERRORSave failedFIX ▸Check permissions and source control

EMIT008ERRORDestination is not a valid content pathFIX ▸Use /Game/...

EMIT009INFOFont family imported from @font-face or the installed fonts as <dest>/Fonts/F_<Family>FIX ▸Check that the font licence permits embedding in a game

EMIT010INFO / WARNINGFont family not found (default font used, metrics differ from the browser), or a declared font file could not be readFIX ▸Install the family, ship it with @font-face, or pass --font

IO001ERRORSource file could not be read

IO002WARNINGManifest or header could not be written