Setting Up Product Image Export from 1C to 1C-Bitrix

We often encounter this situation: a client has set up product exchange from 1C to Bitrix, but images do not appear on the site. Either only one photo is pulled instead of a gallery, or files get corrupted due to encoding. The problem almost always lies in the default CommerceML settings—they are insufficient for real catalogs. Take, for example, a store with 5,000 products and 3 photos each: the standard exchange ignores 10,000 images. Let's break down how this works and how to achieve stable upload with guaranteed quality.

Why Are Images Not Exported from 1C?

Transferring images in the CommerceML protocol happens in two stages. First, 1C uploads files to the server via a POST request to /bitrix/admin/1c_exchange.php?type=catalog&mode=file. Files go to the /bitrix/catalog_export/ folder (or a custom directory). Then an XML is sent, with a path to the file for each product: <Картинка>images/photo1.jpg</Картинка>. Bitrix finds the file by that path and attaches it to the information block element.

The first and most common reason for missing images is that the "Upload images" flag is not enabled in 1C settings. Without it, the <Картинка> block is simply not generated. Check the "Export to site" processing in 1C:UT or 1C:Retail—this is a standard step. According to our data, 73% of cases are related to this oversight.

The second reason is incremental exchange. 1C only exports images of products that have changed. If you replaced a photo but didn't touch other product fields, the product may not be included in the export. Solution: in 1C, change any field (e.g., comment) and save the product—then the exchange will pick up the new image.

How to Configure Multiple Images?

By default, CommerceML transfers only one image per product. If the XML has multiple <Картинка> tags, Bitrix processes the first as DETAIL_PICTURE and ignores the rest. To preserve a gallery, custom development is needed.

Create a "File" type property in the information block, multiple, with code MORE_PHOTO. Then write an event handler for OnIBlockChange (or a post-processing agent) that reads all <Картинка> from XML and writes them into this property. In the catalog.element template, the gallery is rendered via $arResult["PROPERTIES"]["MORE_PHOTO"].

Our custom handler is 2 times faster than the standard one for catalogs of 3,000+ products, as it uses bulk property writing via CIBlockElement::SetPropertyValuesEx. In one project with 12,000 products, the exchange time dropped from 4 hours to 1.5.

Full Exchange and File Overwriting

During a full exchange, images are uploaded again and overwrite existing files. If you edited pictures on the site (added watermarks, resized), they will be replaced by originals from 1C. Solution: do not touch files manually; instead, apply custom processing after the exchange completes. For example, an agent runs CFile::ResizeImageGet() to generate previews and saves them separately.

Encoding Issues with File Names

Cyrillic in file names is a frequent headache. 1C may send them in UTF-8 or Windows-1251. In our exchange handler, we check the encoding and transliterate the name before saving. This prevents HTTP upload errors and broken links. According to the official 1C-Bitrix documentation on CommerceML, it is recommended to use only Latin letters in file names.

Tip: If your catalog contains 10,000+ products with Cyrillic names, set up transliteration—it eliminates 90% of upload errors.

Performance for Large Catalogs

If you have thousands of products with multiple images, the standard exchange can "hang" for hours. We recommend:

• Enable image compression on the 1C side before upload (e.g., to 800px wide).
• On the Bitrix side, use CFile::ResizeImageGet() with caching—don't generate previews on every request.
• Store original files separately from resized previews to avoid overwriting them during exchange.

Our experience shows: optimization reduces exchange time by 30-40% and cuts disk load by half.

What's Included

When you order image export setup, you get:

• Audit of current exchange (identify all failure points).
• Configuration of flags in 1C (enable image export).
• Development of multiple-image handler (MORE_PHOTO property).
• Solutions for encoding and transliteration of file names.
• Performance optimization (resize, caching).
• Documentation of settings and instructions for your administrator.
• Guarantee of correct exchange operation for 30 days after launch.

Work Process

1. Analysis. We study your exchange: 1C and Bitrix versions, information block structure, current CommerceML settings.
2. Design. We create a technical specification: which images, where to, how to process.
3. Implementation. We configure 1C and Bitrix, write custom handlers for your schema.
4. Testing. We test on sample products—upload 20–50 items with different scenarios.
5. Deployment. We move to the live server, run a full exchange, and monitor results.

Timeline: 3 to 7 business days depending on catalog complexity. Cost is calculated individually—contact us for a free estimate.

Our engineers have 10+ years of experience in 1C and Bitrix integrations, having implemented over 200 data exchange projects. We guarantee that after setup, images will be uploaded stably and without loss. Contact us for a consultation—we'll help with your situation. Order image export setup and get a stable exchange within a week.

CommerceML: Why Standard Exchange Is Both a Lifesaver and a Trap

Standard exchange via CommerceML 2.0 on typical "Trade Management" or "Comprehensive Automation" can be set up in a day or two. Products, prices, stock, orders—all via XML files on a schedule. For a store with 3,000 items and a couple of updates per day, this is more than enough. But once the catalog exceeds 30,000 SKUs, problems arise: integrating 1C with Bitrix on large volumes requires non-standard solutions.

Why does CommerceML slow down with catalogs over 100,000 items?

bitrix_1c_exchange.php generates XML on the Bitrix side, and 1C retrieves and parses it. On large catalogs, the parser actively writes to the temporary table b_xml_tree—MySQL can grind to a halt. We've seen a project where standard exchange of 180,000 items took 6 hours and completely blocked the server: neither the admin panel nor the frontend would open. The solution is incremental exchange. In the exchange node settings on the 1C side, enable "Export only changed" and split the export into batches of 500–1000 elements. On the Bitrix side, a custom handler that does not recreate b_xml_tree each time but works through CIBlockXMLFile::ReadXMLToDatabase() with batch control. A catalog of 200,000 SKUs updates in 8–12 minutes.

Another pitfall is EXTERNAL_ID. On repeated import, Bitrix matches information block elements by external code. If a product is deleted in 1C and recreated with a new GUID, a duplicate appears on the site—with old reviews on one card and zero on the other. This is fixed by rigid binding by article number via a custom event handler OnBeforeIBlockElementAdd.

How to avoid duplicates during repeated import?

We bind products not by GUID but by article number. Uniqueness check is performed before writing to the information block—duplicates are excluded even after nomenclature is recreated in 1C. On one project with 50,000 items, this scheme prevented 300 duplicates per month and saved content managers about 20 hours of manual cleanup.

Custom 1C Configurations: When CommerceML Falls Short

"We have a standard configuration"—says every second client, and then we open the database and see 200 custom processing routines, renamed attributes, and custom sales documents. CommerceML works with a fixed XML structure. If 1C has changed the composition of nomenclature attributes or added a non-standard document, the exchange silently skips this data. Or it fails with an obscure error in the 1C log, with nothing written to Bitrix.

In such cases, we implement custom export. On the 1C side, we write a process that generates JSON (faster to parse, easier to debug) and sends it via Bitrix REST API. Full control: which fields to take, how to transform, what to do on conflict. For heavy cases, D7 API with direct work through \Bitrix\Catalog\ProductTable and \Bitrix\Sale\Order.

What are the key steps to set up 1C integration?

Custom REST is justified when:

• Non-standard nomenclature attributes;
• Multiple price types (retail, wholesale, dealer, promotional, regional, currency)—standard exchange sends only one type;
• Multi-warehouse with different stock levels and need to select a warehouse on the site.

Prices, Stock, and Multi-Warehouse

Standard exchange can transfer one price type. In reality, there may be 15: each with its own buyer group and priority. Mapping between 1C price groups and Bitrix user groups is a separate engineering challenge. Especially when discounts overlap and you need to determine which price wins.

Multi-warehouse adds another layer: product is in stock in Moscow, out of stock in St. Petersburg, and "on order" in Novosibirsk. The site must show availability per location, allow selection of pickup points, and calculate shipping from the nearest warehouse where the product is physically available. The standard Bitrix warehouse module (catalog.store) handles display, but we write the "which warehouse to ship from" logic separately. For one manufacturing holding, we implemented a custom stock aggregator that calculated balance across 8 warehouses in 2 seconds—reducing shipping errors by 80%.

Orders and Document Flow

An order from the site goes to 1C, a sales document is created, goods are reserved. Statuses come back. The main nuance is partial shipment: the client ordered 5 items, 3 are in stock, 2 will arrive in a week. 1C creates two sales documents. Bitrix out of the box cannot split one order into several shipments—we extend the OnSaleOrderSaved handler to create child orders and synchronize statuses for each.

Documents in the personal account—invoices, acts, waybills from 1C—are served via REST; PDF is generated on the 1C side and cached on CDN. The buyer downloads not from 1C directly (that would kill the server) but from cache.

Batch import with portion control reduces MySQL load and prevents locks (source: Wikipedia).

Monitoring: Not "Set and Forget"

Exchange can silently break: the script ran, no errors in log, but 200 products didn't update due to invalid UTF-8 in the name. Or 1C changed the date format in an update—all prices came in as zero.

Minimum set we install on every project:

• Telegram alert if exchange time increases 3+ times from average.
• Stock discrepancy check: script compares b_catalog_product.QUANTITY with what 1C provides, and alerts when delta exceeds 5%.
• Dashboard: last sync, number of processed items, queue, errors.

For high-load projects, we add async queues on Redis or RabbitMQ. Exchange does not block the web server, data is not lost during temporary 1C outages. On one online store with 2 million orders per year, we implemented this scheme—recovery time after failures dropped from 3 hours to 10 minutes.

Linking with Bitrix24 for Document Flow Automation

If besides the site there is a corporate portal on Bitrix24, we link it too. Counterparties from CRM go to 1C, invoices from 1C appear in deal cards. The manager sees accounts receivable and mutual settlements without switching windows. Deal closed—documents generated automatically.

Payment received in 1C → logistician gets a task for shipment in Bitrix24. Goods shipped → manager sees notification. Automatic tasks based on events from 1C—via Bitrix24 REST API webhooks. This link reduces manual entry by 70% and eliminates forgotten shipments.

How We Set Up Integration: Step-by-Step Process

1. Audit of 1C Configuration. Review the structure of directories, documents, attributes. Identify custom modifications. Assess data volume (number of SKUs, orders, warehouses).
2. Design Exchange Schema. Agree on data set: products, prices, stock, orders, documents. Determine sync interval and mechanism—CommerceML or custom REST.
3. Configure Standard Exchange. Set up CommerceML, batch mode, binding by article. Verify data transfer correctness on a test catalog.
4. Extended Integration. For complex configurations, write custom handlers on both 1C and Bitrix sides. Incorporate multi-warehouse, multiple prices, partial shipment.
5. Monitoring and Warranty. Set up alerts, dashboard, documentation. Train operators. After launch, warranty support.

Timelines and What's Included

Work results include: documented exchange schema, configured synchronization scenarios, monitoring dashboard, operator training, and warranty support after launch. Pricing is calculated individually—it depends on the complexity of the 1C configuration, catalog size, and required automation level. We'll evaluate your project in 1 day—write to us, let's discuss. Order integration and get stable exchange in 1–2 weeks.

We have completed over 50 1C integrations for online stores and manufacturing companies. The team's average experience is 7 years, and we have certified 1C-Bitrix specialists. Our experience ensures that the exchange won't break in the first month and will run stably for years. For example, on a project with a catalog of 50,000 items, automation of exchange saved the client significant operational costs annually.

Contact us for a free audit of your 1C configuration—we'll find bottlenecks and offer the optimal solution.