WebToffee Logo
  • Home
  • Plugins
  • Bundles
  • Blog
  • Documentation
  • Support
Login
0

  • Getting Started
    • Plugin setup
    • Import/Export Products
    • Import/Export Product Reviews
    • Import/Export Product Tags
    • Import/Export Product Categories
  • Import
    • Import products with attributes
    • Import google drive images
    • Import grouped products
    • Import products using URL
    • Import every 'X' hours
    • Importing downloadable products
    • Import subscription products
    • Import products using CSV
    • Import products with images
    • Updating evaluation fields on Import
    • Import products from MS Excel
    • Import products with categories
    • Import products from Google Spreadsheet
    • Import composite products
    • Import external/affiliate products
    • Import variable products from CSV
  • Export
    • Export products to CSV
    • Batch export products
    • Exporting products by category
    • Export definite number of products
    • Export products to MS Excel
    • Export product with categories
    • Export products with images
    • Export variable products
    • Export products with attributes
  • Meta Data
    • Import product metadata from CSV
  • Bulk Edit
    • Bulk update product category
    • Bulk upload variable products
    • Bulk upload products
    • Bulk update product price
  • FTP Cron Schedules
    • Cron Import products using multiple CSVs
    • Cron scheduled Import-export
    • Export products via SFTP
  • Advanced Topics
    • Export without user restrictions
    • Migrate from Shopify to WooCommerce
    • Update simple and variable products
    • Import/Export custom fields
    • Update inventory data
    • Import/Export products to Google Spreadsheets
    • Updating Single Field for Products
    • Updating product stock
    • Plugin visibility on a multisite
    • WPML Compatibility
    • Thumbnail regeneration failure on product import
    • Import/Export product bundles
    • Set up cron when site activity is less
    • Export WPML multilingual products
    • Update product variations without SKU
    • Steps to import WPML products
    • Duplicate entry in the media library
    • Memory limitations on Import/Export
    • Import/Export product images in ZIP
    • Modifying Import/Export Batch Count and Effects on Performance
  • Code Snippet
    • Set email alert on cron import
    • Export/Import bundled products
    • Export/Import product variation images
    • Filter and export WooCommerce products using custom taxonomy
    • Alter product data
    • Compatibility with YITH Product Bundle
    • Export reviews with no ratings
    • Import images from multiple columns
    • Support for WebP images
  • Troubleshooting
    • Finding PHP Error Logs
    • Resolve “Call to undefined function mb_detect_encoding()”
    • Resolve post ID conflicts on import
    • Troubleshooting Guide-Products
    • Maximum file upload size
  • Third-Party Compatibility
    • Plugins
  • FAQ
    • Frequently asked questions
  • Changelog
    • Version 1.1.5

Documentation/Product Import Export Plugin for WooCommerce/Thumbnail regeneration failure while importing WooCommerce products

Thumbnail regeneration failure while importing WooCommerce products

Last updated on May 27, 2022

Product Import Export Plugin for WooCommerce facilitates you to import products along with their images into a Woocommerce website using a CSV file.

When you import images for products, WordPress dynamically regenerates thumbnails of the images of that product. However, sometimes even if the full-size images are uploaded, the regeneration of the product thumbnails results in an error resulting in blank thumbnails.

Image thumbnail regeneration failure can due to any of the following reasons:

  1. Conflict with any existing image optimizer plugin
  2. ImageMagick and limitations in hosting
  3. Dimensions or size of the image

Conflict with any existing image optimizer plugin

The regeneration of thumbnails, while importing using the Product Import Export plugin can result in an error due to conflict with any existing image optimizer plugin.

When importing an image, if any image optimizer plugin is active, the plugin may try to compress and optimize the images and reduce its size. This prevents the regeneration of thumbnails.

If you are using any image optimizer plugin, and if the error in thumbnail regeneration is due to this conflict, it can be avoided by deactivating the plugin while the import and trying again the import.

ImageMagick and Limitation in Hosting

When this is the case, the image regeneration issue can be resolved by adding the line SetEnv MAGICK_THREAD_LIMIT 1  to the top of the .htaccess file.

ImageMagick uses multiple threads to process the images as fast as possible. But using multiple threads can cause the error of image thumbnail regeneration because of the limitations in hosting that prevents you from running multi-thread tasks.

This can be avoided by limiting ImageMagick to a single thread. The above line sets the number of threads for ImageMagick to 1 and will successfully generate thumbnails for the images.

Dimensions or Size of the Image

If the size or dimensions of the image are too small or too large, WordPress fails to generate thumbnails for that image or the thumbnails generated will be pixelated or blurry. This can be overcome by making sure that the images being imported are of optimal size and dimensions.

To know more about Product Import Export plugin visit our product page.

  • Was this article helpful?
  • Yes, thanks!Not really
Get the plugin

On this page

  • Conflict with any existing image optimizer plugin
  • ImageMagick and Limitation in Hosting
  • Dimensions or Size of the Image

This article posted in Advanced Topics, Documentation, Knowledge Base, Product Import Export Plugin for WooCommerce and tagged CSV, export, image, Import, product

Written by

WebToffee Team

WebToffee Team is a group of WordPress and WooCommerce enthusiasts consisting of expert developers, testing engineers, technical support engineers, and SMEs.

Comments (4)

  1. WebToffee Team

    Mark

    September 3, 2018

    Hi Lily,

    The issue you are facing may be due to some theme conflict. Kindly try to regenerate thumbnail under Woocommerce > status > tools > regenerate thumbnail.

    Reply
  2. K L

    K L

    August 31, 2018

    Many of the thumbnails regenerate, a bunch do not. It can’t be a size problem, not only are they all exactly the same dimensions and dpi, but in one case the thumbnail is identical to two products that regenerated successfully (3 of the same item.)

    Suggestions?

    Lily

    Reply
    • Chris

      December 12, 2018

      Hi Lily, did you manage to fix this issue? I’m having the same problem and it’s driving me nuts. I’m on Hostgator shared plan. Thanks

      Reply
      • Mark

        Mark

        December 12, 2018

        Hi Chris,

        The issue of thumbnail regeneration failure during import might be due to some theme conflicts. Kindly please try Regenerating the thumbnails manually from Woocommerce > status > tools > regenerate thumbnail.

        If the issue still persists please reach us via support.

        Reply

Got any query? Please leave a comment or reach out to our support

Cancel reply

Your email address will not be published. Required fields are marked *

We develop awesome WordPress plugins & WooCommerce extensions to help build successful online businesses.

© 2023 WebToffee. All rights reserved.

Our plugins

  • GDPR Cookie Consent
  • PDF Invoices & Packings Slips
  • Product Import Export Plugin
  • User & Customer Import Export
  • Import Export Suite
  • Sequential Order Numbers
  • Smart Coupons for WooCommerce
  • URL Coupons for WooCommerce
  • PayPal Express Checkout
  • Stripe Payment Gateway
  • Subscriptions for Woocommerce
  • Product Catalog Sync for Facebook
  • PrintNode for PDF Invoices
  • Order, coupon, subscriptions for WooCommerce
  • WordPress Backup and Migration
View more +

Get Started

  • Plugins
  • Testimonials
  • Affiliates
  • We're hiring

Help & Support

  • Documentation
  • Documentation (Basic)
  • FAQ
  • Support

Company

  • Terms & Conditions
  • Privacy Policy
  • Refund policy
  • Support policy
  • License Activation

© 2023 WebToffee. All rights reserved.

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies. However you may visit Cookie Settings to provide a controlled consent.
Cookie settingsACCEPT
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of the basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website, to store user preferences and provide you with content and advertisements that are relevant. Such cookies will be stored on your browser but only upon procuring consent.

You will also have the option to opt-out of these cookies should you want to. But opting out of some of these cookies may have an effect on your browsing experience as per the descriptions elucidated against the respective categories below.

Necessary
Always Enabled
The cookies defined under this category are absolutely essential for the website to function. Hence they are loaded by default irrespective if user consent.
CookieDescription
__cfruidCloudflare sets this cookie to identify trusted web traffic.
__stripe_midStripe sets this cookie cookie to process payments.
__stripe_sidStripe sets this cookie cookie to process payments.
cookielawinfo-checkbox-advertisementSet by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category .
cookielawinfo-checkbox-analyticsSet by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Analytics" category .
cookielawinfo-checkbox-necessarySet by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Necessary" category .
cookielawinfo-checkbox-preferencesThis cookie is set by the GDPR Cookie Consent plugin to check if the user has given consent to use cookies under the "Preferences" category.
CookieLawInfoConsentRecords the default button state of the corresponding category & the status of CCPA. It works only in coordination with the primary cookie.
PHPSESSIDThis cookie is native to PHP applications. The cookie is used to store and identify a users' unique session ID for the purpose of managing user sessions on the website. The cookie is a session cookie and is deleted when all the browser windows are closed.
viewed_cookie_policyThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not a user has consented to the use of cookies. It does not store any personal data.
Analytics
Analytics cookies help us understand how our visitors interact with the website. It helps us understand the number of visitors, where the visitors are coming from, and the pages they navigate. The cookies collect this data and are reported anonymously.
CookieDescription
_gaThis cookie is installed by Google Analytics. The cookie is used to calculate visitor, session, campaign data and keep track of site usage for the site's analytics report. The cookies store information anonymously and assigns a randomly generated number to identify unique visitors.
_ga_BQH8MSKD4MThis cookie is installed by Google Analytics.
_gat_gtagIdentification code of website for tracking visits.
_gidThis cookie is installed by Google Analytics. The cookie is used to store information on how visitors use a website and helps in creating an analytics report of how the website is doing. The data collected including the number visitors, the source where they have come from, and the pages visited in an anonymous form.
_hjAbsoluteSessionInProgressHotjar sets this cookie to detect the first pageview session of a user. This is a True/False flag set by the cookie.
_hjFirstSeenHotjar sets this cookie to identify a new user’s first session. It stores a true/false value, indicating whether it was the first time Hotjar saw this user.
_hjidHotjar cookie. This cookie is set when the customer first lands on a page with the Hotjar script. It is used to persist the random user ID, unique to that site on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.
_hjIncludedInPageviewSampleHotjar sets this cookie to know whether a user is included in the data sampling defined by the site's pageview limit.
_hjIncludedInSampleThis cookie is set to let Hotjar know whether that visitor is included in the sample which is used to generate heatmaps, funnels, recordings, etc.
_hjIncludedInSessionSampleHotjar sets this cookie to know whether a user is included in the data sampling defined by the site's daily session limit.
_hjTLDTestTo determine the most generic cookie path that has to be used instead of the page hostname, Hotjar sets the _hjTLDTest cookie to store different URL substring alternatives until it fails.
CONSENTYouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data.
has_recent_activityThis cookie is used to signal to the code repository website if the user has browsed other website resources during the current session.
tk_aiGathers information for our own first-party analytics tool about how our services are used. A collection of internal metrics for user activity and is used to improve user experience.
tk_lrThis cookie is set by the JetPack plugin on sites using WooCommerce. This is a referral cookie used for analyzing referrer behavior for Jetpack.
tk_orThis cookie is set by the JetPack plugin on sites using WooCommerce. This is a referral cookie used for analyzing referrer behavior for Jetpack.
tk_qsGathers information for our own first-party analytics tool about how our services are used. A collection of internal metrics for user activity and is used to improve user experience.
tk_r3dThe cookie is installed by JetPack. Used for the internal metrics for user activities to improve user experience.
Advertisement
Advertisement cookies help us provide our visitors with relevant ads and marketing campaigns.
CookieDescription
_fbpThis cookie is set by Facebook to deliver advertisements when they are on Facebook or on a digital platform powered by Facebook advertising after visiting this website.
frThe cookie is set by Facebook to show relevant advertisements to the users and measure and improve the advertisements. The cookie also tracks the behavior of the user across the web on sites that have Facebook Pixel or Facebook social plugin.
VISITOR_INFO1_LIVEA cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface.
YSCYSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages.
yt-remote-connected-devicesYouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
yt-remote-device-idYouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
Preferences
Preference cookies are used to store user preferences to provide them with content that is customized accordingly. This includes the language of the website or the location of the visitor.
CookieDescription
_gh_sessThis cookie is used to preserve users' states across page requests.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
CookieDurationDescription
_hjSession_137657130 minutesNo description
_hjSessionUser_13765711 yearNo description
_octo1 yearNo description available.
_zendesk_authenticatedpastNo description
_zendesk_sessionsessionNo description available.
_zendesk_shared_sessionsessionNo description available.
edd_wp_session12 hoursNo description available.
logged_in1 yearNo description available.
m2 yearsNo description available.
Save & Accept