--- title: "1C Errors: How to Find the Cause and Fix a Failure in 1C 8.3" country: KZ lang: en author: Сапа Т.И. (https://buhgpt.kz/authors/sapa-ti) date: 2026-10-13 canonical: https://buhgpt.kz/suraqtar/oshibki-1s-kak-nayti-prichinu-i-ispravit-sboy-v-1s-8-3-en source: BuhGPT --- # 1C Errors: How to Find the Cause and Fix a Failure in 1C 8.3 > **TL;DR:** In 2026, an internal 1C error is resolved after its source has been identified using the full message text and the event log. If the failure concerns not 1C but the Electronic Invoicing Information System, and the inability to issue an electronic invoice due to a technical err --- In 2026, an internal 1C error is resolved after its source has been identified using the full message text and the event log. If the failure concerns not 1C but the Electronic Invoicing Information System, and the inability to issue an electronic invoice due to a technical error is confirmed on the authorised body's website, the invoice may be issued on paper and then entered into the EIIS within 15 calendar days from the date the error is resolved (Articles 209 and 492 of the Tax Code of the Republic of Kazakhstan). What a 1C Stream Format Error Means The messages “1C stream format error,” “1C format error,” and “1C file error” may look similar, but they do not necessarily have the same cause. The word “format” only indicates that the program was unable to correctly read or process the received data. The source may be a file, a response from an external service, data exchange between databases, or a value that does not match the expected structure. The message “Internal data reading error in 1C:Business Network. Format error” does not in itself make it possible to determine exactly which object caused the failure. Diagnosis requires the full technical error text, information about the operation being performed, the platform and configuration versions, and event log entries for the relevant time. When analysing such a message, check the following in sequence: - which operation was performed immediately before the error appeared; - which document, file, or service response was being processed; - whether the received data matches the format expected by the installed configuration; - whether the error recurs when processing the same object; - whether the event log contains an additional description of the exception. Without analysing the technical data, it cannot be asserted that the cause lies in a specific field or software module procedure. The same brief text may accompany different failures: an incomplete service response, a data structure violation, an interrupted exchange, or a processing error in the configuration. Such an error should not immediately be regarded as corruption of the entire infobase. First, determine during which action it appears: when opening the database, loading a specific file, receiving a document through an exchange service, or posting an accounting document. How to Find the Cause of an Error in 1C 8.3 Before fixing the error, record the full message, the date and exact time it appeared, the username, and the actions performed by the user. It is useful to save a screenshot and note the document, counterparty, file, or exchange associated with the failure. The statement “1C is not working” is insufficient for diagnosis. It is convenient to perform the checks in the following order: - Repeat the operation with the same object and determine whether the error occurs consistently. - Check whether it appears for another user or at another workstation. - Determine whether the problem is associated only with a single document, file, or exchange session. - Compare the time of the error with a configuration update, a change in settings, or the restoration of an exchange. - Review the event log for the exact period when the failure occurred. - Provide the specialist with the full message text and the sequence of actions that leads to the error. If the error can be reproduced only when working with one document, its fields and related data are analysed first. If the same failure is observed by all users, the availability of the server, database, and external service, as well as the correctness of the installed configuration, are additionally checked. The final cause is established using the event log, the technical description of the exception, and the reproduction results. If the error occurs only at one workstation, its connection settings, platform version, and user access are compared with those of a workstation where the operation is completed successfully. This makes it possible to distinguish a local problem from an error affecting the entire infobase. It is important for the accountant not to delete the problematic document or enter it again until the result of the first operation has been checked. Duplication may complicate data reconciliation, especially if the document was saved, generated accounting entries, or was transmitted to an external service. How to Fix a Data or Format Error in 1C The method of correction depends on the identified cause. If the error is associated with a specific file, check its origin, integrity, and compliance with the import format. If the failure occurs during an exchange with a service, compare the sent and received data, the request time, and the event log entries. Without access to the configuration, an accountant generally cannot investigate the software module independently. The safe procedure is as follows: - save the full error text and information about the problematic document; - check the document's required fields in the available form; - make sure that the correct file has been selected and that it was received from the expected source; - check whether the document has already been saved, posted, or sent; - create a backup copy before making technical changes; - do not edit the program code without the involvement of a specialist; - provide the specialist with the platform and configuration versions and information from the event log; - after the correction, repeat the operation and reconcile the result with the source documents. If the problem appeared after an update, inform the specialist of the release number before and after the update, the installation time, and the list of operations performed. A coincidence in timing does not by itself prove that the update caused the problem: this is established by reproducing the error and analysing the technical records. After operation has been restored, make sure that the document has been saved and posted in the correct database, that the amounts and details have not changed, and that resubmission has not created a duplicate. If the failure affected the issuance of an electronic invoice, the document's status in the EIIS must be checked separately. The rule concerning a paper invoice applies only when the inability to issue an electronic invoice due to technical errors is confirmed on the authorised body's website. For VAT payers, this is provided for by Article 492 of the Tax Code of the Republic of Kazakhstan; for non-VAT payers, by Article 209 of the Tax Code of the Republic of Kazakhstan. In both cases, the paper invoice must be entered into the EIIS within 15 calendar days from the date the technical errors are resolved (Articles 209 and 492 of the Tax Code of the Republic of Kazakhstan). File, Stream, and Server Errors: How the Actions Differ In the event of a file error, first check the file itself: whether it relates to the required exchange, whether it opens in the source program, whether its export was completed, and whether it was modified after creation. If the failure is consistently associated with only one file, provide it to the specialist together with the exact 1C message, in compliance with the established procedure for accessing accounting data. A stream error means that the program was unable to read the data sequence in the expected form. The cause may lie in the received data, the exchange settings, or the transmission mechanism. Reloading helps check whether the error can be reproduced, but does not by itself identify the source of the failure, so its result should be recorded. When the message “1C server error” appears, first determine which component is involved: the 1C server, the database management system, or an external service. Check the system's availability to other users, the exact time of the failure, and the full technical text. Restarting before recording this information may hinder subsequent diagnosis and interrupt the work of other users. 1C errors should be investigated using the full message text, the platform version, the configuration name, and the conditions under which they occur. A similar description for a different version or operation is not sufficient grounds for modifying the database or program code. It is important to distinguish between a 1C technical error and a confirmed EIIS technical error. The rules on issuing a paper invoice apply when the inability to issue one in the state information system has been confirmed, not in the event of every local failure of the accounting software (Articles 209 and 492 of the Tax Code of the Republic of Kazakhstan). Frequently Asked Questions What should I do if a 1C 8.3 stream format error appears? — Record the full text, date and time, the user's action, and the problematic file or document. Do not clear the database or change the code until the event log has been analysed and a backup copy has been created. How do I fix a data reading error in 1C:Business Network? — Identify the operation during which the failure occurred, and check the exchange result and event log entries. A specific field or section of program code cannot be reliably identified from one brief message. Does a 1C data error mean that the entire database is corrupted? — Not necessarily. The error may be associated with one document, file, response from an external service, or individual workstation. The scope of the problem is established by reproducing it and analysing the technical records. Can I reload a file after an error? — First check whether the initial operation was completed and whether the document appeared in the database or external system. After that, reload the file in a way that does not create a duplicate. What should I do if an electronic invoice cannot be issued due to a technical error? — If the inability to issue it in the EIIS is confirmed on the authorised body's website, the invoice may be issued on paper and entered into the system within 15 calendar days from the date the error is resolved (Articles 209 and 492 of the Tax Code of the Republic of Kazakhstan). Where can I check registered 1C errors? — Search using the full message text and the platform and configuration versions. A solution for a different version must not be applied automatically without comparing the conditions under which the error occurred. Sources - Tax Code of the Republic of Kazakhstan, Article 209 “Requirements for the Issuance of Invoices by Non-Payers of Value Added Tax.” - Tax Code of the Republic of Kazakhstan, Article 492 “Requirements for the Issuance of Invoices by Payers of Value Added Tax.” --- _BuhGPT — ИИ-помощник для бухгалтеров Казахстана: https://buhgpt.kz_