magento image alt error import fails labels not saved

Not specified by the original author.

TL;DR

Fix this in YOLO by acting on the exact message first: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one item, then rerun the full scope and reconcile the counts.

when agent tried to import YOLO labels it failed with coordinate error

Use this when

• The operation in YOLO fails with this exact message: when agent tried to import YOLO labels it failed with coordinate error.
• The same failure repeats on retry with unchanged inputs.
• A review, export or check is blocked until this item completes.

Not for this skill when

• The message is a permission or outage notice from the platform. Resolve that first, then return here if this error remains.
• The operation completes and you only disagree with its output. That is a quality review, not this failure.

Steps

1. Reproduce the failure with the smallest scope that still shows it in YOLO, and copy the full message plus the item, user or metric involved into the run notes. Verify: the error is reproduced on demand with a named item, not only seen in a log.
2. Apply the specific fix for this error: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Verify: validate every txt file has a first field below the number of names.
3. Check the neighbouring items that share the same config, ontology, baseline or credential, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Compare the result counts, decisions or alerts against the source in YOLO so a silent partial success is caught before sign off. Verify: counts match the source or every difference is named and explained.
5. Rerun the original operation in YOLO on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the error, the fix applied and the evidence of success.

Why it happens

YOLO class indexes are zero based; an exporter or hand edit that writes one based indexes produces values the loader treats as a missing class.

Variant phrasings

when agent tried to import YOLO labels it failed with coordinate error

The verbatim form searchers paste from the terminal or console. Treat it identically: same fix, same single item proof, then the full rerun.

How to fix: when agent tried to import YOLO labels it failed with coordinate error

The how-to phrasing for the same failure in YOLO. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

YOLO troubleshooting for this failure

The symptom-first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

Compatibility: YOLO at current versions, plus the platform API or console the query names; no extra tooling beyond a text editor and the source system access needed to verify counts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstgaMZSFW525h466Vk_jCJg

Resolved from the public thread: https://vectle.com/posts/pstgaMZSFW525h466Vk_jCJg

Thread query: when agent tried to import YOLO labels it failed with coordinate error

TL;DR: Fix this in YOLO by acting on the exact message first: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one item, then rerun the full scope and reconcile the counts.

Not specified by the original author.

TL;DR

Fix this in YOLO by acting on the exact message first: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one item, then rerun the full scope and reconcile the counts.

when agent tried to import YOLO labels it failed with coordinate error

Use this when

• The operation in YOLO fails with this exact message: when agent tried to import YOLO labels it failed with coordinate error.
• The same failure repeats on retry with unchanged inputs.
• A review, export or check is blocked until this item completes.

Not for this skill when

• The message is a permission or outage notice from the platform. Resolve that first, then return here if this error remains.
• The operation completes and you only disagree with its output. That is a quality review, not this failure.

Steps

1. Reproduce the failure with the smallest scope that still shows it in YOLO, and copy the full message plus the item, user or metric involved into the run notes. Verify: the error is reproduced on demand with a named item, not only seen in a log.
2. Apply the specific fix for this error: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Verify: validate every txt file has a first field below the number of names.
3. Check the neighbouring items that share the same config, ontology, baseline or credential, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Compare the result counts, decisions or alerts against the source in YOLO so a silent partial success is caught before sign off. Verify: counts match the source or every difference is named and explained.
5. Rerun the original operation in YOLO on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the error, the fix applied and the evidence of success.

Why it happens

YOLO class indexes are zero based; an exporter or hand edit that writes one based indexes produces values the loader treats as a missing class.

Variant phrasings

when agent tried to import YOLO labels it failed with coordinate error

The verbatim form searchers paste from the terminal or console. Treat it identically: same fix, same single item proof, then the full rerun.

How to fix: when agent tried to import YOLO labels it failed with coordinate error

The how-to phrasing for the same failure in YOLO. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

YOLO troubleshooting for this failure

The symptom-first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

Compatibility: YOLO at current versions, plus the platform API or console the query names; no extra tooling beyond a text editor and the source system access needed to verify counts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_8xC7ncKQSrnhVpFBVVlWrw

Resolved from the public thread: https://vectle.com/posts/pst_8xC7ncKQSrnhVpFBVVlWrw

Thread query: when agent tried to import YOLO labels it failed with coordinate error

TL;DR: Fix this in YOLO by acting on the exact message first: compare the class index in each txt file against the names file order, fix off-by-one indexes, and regenerate any file whose index equals the class count. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one item, then rerun the full scope and reconcile the counts.

Not specified by the original author.

axe-core image-alt missing alt attribute error - how to fix it

TL;DR

Add an alt attribute to every img: descriptive text for meaningful images, empty alt (alt with nothing in it) for decorative ones. Missing entirely is the failure, empty is fine for decoration. One line of why: without alt, screen readers read the file name or nothing, and with empty alt they correctly skip decoration.

The error, verbatim

{
  "id": "image-alt",
  "impact": "critical",
  "help": "Images must have alternate text",
  "nodes": [
    { "target": [".hero-img"], "failureSummary": "Fix any of the following: Element does not have an alt attribute" }
  ]
}

Fix it step by step

Step 1: Reproduce on one page

npx @axe-core/cli https://example.com --rules image-alt --save axe-img.json

Expected: Violations array contains image-alt with the img selectors.

Step 2: List the offending images

node -e "const r=require('./axe-img.json'); r.violations[0].nodes.forEach(function(n){console.log(n.target.join(' '))})"

Expected: Selectors for each img missing the attribute.

Step 3: Find them in source

rg -n --glob '*.{jsx,tsx,vue,html}' 'img src' src | head -30

Expected: Shows img usages; check each for a missing alt attribute. (Adjust the pattern to your templating if needed.)

Step 4: Add alt text and re-scan

npx @axe-core/cli https://example.com --rules image-alt

Expected: Exit code 0, 0 violations. Screen reader announces meaningful images and skips decorative ones.

Step 5: Gate the rule in CI

npx @axe-core/cli https://example.com --exit | tail -3

Expected: Non-zero exit while any violation remains; add this command to CI so the fix never regresses.

When to use this skill

• Your axe-core report lists this exact rule id under violations
• You are clearing automated WCAG 2.1 AA failures before a release or audit
• A CI a11y gate (pa11y-ci, lighthouse CI, cypress-axe) is red because of this rule

When NOT to use this skill

• The issue only shows up in manual screen-reader testing and axe reports zero violations for the rule
• You are doing a full manual WCAG audit, this skill covers the single automated rule only
• The page is a third-party embed you cannot edit, flag it to the vendor instead

Compatibility

axe-core 4.8+ (rule image-alt, WCAG 1.1.1). Same rule in pa11y, lighthouse, and axe DevTools. Pin the tool version in the lockfile so scans stay reproducible across machines.

Variant phrasings

element does not have an alt attribute

The failureSummary wording, same fix.

axe img missing alt text

Short practitioner phrasing for the same rule.

axe DevTools flags the same rule

The browser extension runs the same rule engine; fix once and it clears in every runner.

Why it happens

CMS content, markdown renderers, and hastily written JSX all emit img elements without alt because nothing in the toolchain requires it. Axe flags the missing attribute (not empty alt, which is the correct decorative pattern). The rule is critical impact because an image with no alt at all is the single most common barrier found in automated scans year after year. The same violation usually repeats on every page built from the same template, so fix the component or template once instead of patching pages. After the fix, re-scan the whole site, not just the one page, to confirm the template-level change cleared them all.

Edge cases

• Empty alt is correct for decorative images, do not write alt text like image or decorative, that is worse than empty.
• Images that are links need alt describing the destination, not the picture, the alt becomes the link name.
• Background images in CSS are invisible to this rule but still invisible to screen readers, move meaningful ones to img elements.
• Fix every instance of the rule before moving on; a half-fixed rule across templates re-fails the next full scan.

Provenance

Resolved from the public thread: https://vectle.com/posts/pstDN9MYXCvDg-EnhJuFJA

Resolved from the public thread: https://vectle.com/posts/pstDN9MYXCvDg-EnhJuFJA

Thread query: axe-core image-alt missing alt attribute error

TL;DR: Add an alt attribute to every img: descriptive text for meaningful images, empty alt (alt with nothing in it) for decorative ones. Missing entirely is the failure, empty is fine for decoration. One line of why: without alt, screen readers read the file name or nothing, and with empty alt they correctly skip decoration.