ERROR_EVT_UNRESOLVED_VALUE_INSERT - 15029 (0x3AB5)
The substitution string for insert index (%1) could not be found.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_EVT_UNRESOLVED_VALUE_INSERT error code indicates that a substitution string could not be found for an insert index during event logging operations. This typically occurs when the system attempts to format or log events using placeholders but fails to resolve them.
Error Details
This error is specific to event logging mechanisms in Windows, where placeholders are used within event messages to substitute dynamic values at runtime. The error suggests that a placeholder was not properly resolved, leading to an unresolved value being inserted into the event message.
Usage Context
The ERROR_EVT_UNRESOLVED_VALUE_INSERT error is commonly encountered when using the Windows Event Logging API (such as ReportEvent, WriteEventLog, or similar functions) to log events. It can also appear in scenarios where custom logging mechanisms are employed that rely on placeholders for dynamic content.
Developer Interpretation
As a developer, this error indicates that there is an issue with the substitution strings used within event messages. Specifically, it suggests that one of the placeholders (indicated by %1, %2, etc.) could not be resolved to its corresponding value during the logging process. This can occur due to various reasons such as incorrect parameter usage or missing values.
Related Errors
ERROR_EVT_INVALID_EVENT_DATA(0x80243006): Indicates an invalid event data format.ERROR_EVT_UNRESOLVED_VALUE_NAME(0x80243017): Suggests that a value name could not be resolved.
FAQ
Q: What does the error code 15029 mean?
A: The error code 15029, ERROR_EVT_UNRESOLVED_VALUE_INSERT, indicates that a substitution string for an insert index could not be found during event logging operations.
Q: How can I resolve this issue?
A: Ensure that all placeholders in your event messages are correctly formatted and that the corresponding values are provided when calling the logging functions. Verify that the values being substituted match the expected types and formats.
Summary
The ERROR_EVT_UNRESOLVED_VALUE_INSERT error code is a generic reference indicating an issue with unresolved substitution strings during event logging operations in Windows. Developers should ensure correct usage of placeholders and provide valid values to avoid this error.