ERROR_EVT_FILTER_TOO_COMPLEX - 15026 (0x3AB2)
The xpath expression exceeded supported complexity. Please simplify it or split it into two or more simple expressions.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_EVT_FILTER_TOO_COMPLEX error code indicates that an XPath expression used for event filtering has exceeded the complexity threshold supported by the system. This limitation is designed to prevent excessive resource consumption and ensure efficient processing of events.
Error Details
This error typically occurs when a complex XPath query is applied in scenarios involving event log filtering or querying. The system imposes limits on the complexity of such expressions to maintain performance and stability.
Usage Context
The ERROR_EVT_FILTER_TOO_COMPLEX error can be encountered in various contexts, including but not limited to:
- Event Log Querying: When using advanced XPath queries for filtering events from the Windows Event Log.
- Custom Logging Solutions: In custom logging solutions that rely on complex event filtering logic.
Developer Interpretation
Developers should interpret this error as an indication that the current XPath expression is too complex and needs to be simplified or broken down into multiple simpler expressions. This approach helps in maintaining optimal performance and resource utilization.
Related Errors
ERROR_EVT_QUERY_TOO_COMPLEX(15027): Similar issue but related to query complexity rather than filter complexity.ERROR_EVT_INVALID_XPATH(15028): Occurs when the XPath expression is syntactically incorrect or invalid.
FAQ
Q: What does the ERROR_EVT_FILTER_TOO_COMPLEX error mean?
A: It indicates that an XPath expression used for event filtering has exceeded the complexity threshold supported by the system. Simplify the expression or split it into multiple simpler expressions to resolve this issue.
Q: How can I avoid encountering this error?
A: Ensure that your XPath queries are kept within the complexity limits imposed by the system. Break down complex queries into simpler ones if necessary.
Summary
The ERROR_EVT_FILTER_TOO_COMPLEX error is a specific technical issue related to event filtering using XPath expressions in Windows systems. Developers should simplify or split complex expressions to maintain optimal performance and resource utilization.