{"record":{"id":"da621d58b812fe97","repo":"bevyengine/bevy","slug":"system-did-not-run-due-to-failed-parameter-validat","errorCode":null,"errorMessage":"System did not run due to failed parameter validation: {0}","messagePattern":"System did not run due to failed parameter validation: (.+?)","errorType":"exception","errorClass":"RegisteredSystemError","httpStatus":null,"severity":"error","filePath":"crates/bevy_ecs/src/system/system_registry.rs","lineNumber":860,"sourceCode":"    /// A system was run by id, but no system with that id was found.\n    ///\n    /// Did you forget to register it?\n    #[error(\"System {0:?} was not registered\")]\n    SystemIdNotRegistered(SystemId<I, O>),\n    /// A cached system was removed by value, but no system with its type was found.\n    ///\n    /// Did you forget to register it?\n    #[error(\"Cached system was not found\")]\n    SystemNotCached,\n    /// The `RegisteredSystem` component is missing.\n    #[error(\"System {0:?} does not have a RegisteredSystem component. This only happens if app code removed the component.\")]\n    MissingRegisteredSystemComponent(SystemId<I, O>),\n    /// A system tried to remove itself.\n    #[error(\"System {0:?} tried to remove itself\")]\n    SelfRemove(SystemId<I, O>),\n    /// System could not be run due to parameters that failed validation.\n    /// This is not considered an error.\n    #[error(\"System did not run due to failed parameter validation: {0}\")]\n    Skipped(SystemParamValidationError),\n    /// System returned an error or failed required parameter validation.\n    #[error(\"System returned error: {0}\")]\n    Failed(BevyError),\n    /// [`SystemId`] had different input and/or output types than [`SystemIdMarker`]\n    #[error(\"Could not get system from `{}`, entity was `SystemId<{}, {}>`\", DebugName::type_name::<SystemId<I, O>>(), .1.input_type_id.name, .1.output_type_id.name)]\n    IncorrectType(SystemId<I, O>, SystemIdMarker),\n    /// System is not present in the `RegisteredSystem` component.\n    // TODO: We should consider using catch_unwind to protect against the panic case.\n    #[error(\"The system is not present in the RegisteredSystem component. This can happen if the system was called recursively or if the system panicked on the last run.\")]\n    SystemMissing(SystemId<I, O>),\n}\n\nimpl<I: SystemInput, O> From<RunSystemError> for RegisteredSystemError<I, O> {\n    fn from(value: RunSystemError) -> Self {\n        match value {\n            RunSystemError::Skipped(err) => Self::Skipped(err),\n            RunSystemError::Failed(err) => Self::Failed(err),","sourceCodeStart":842,"sourceCodeEnd":878,"githubUrl":"https://github.com/bevyengine/bevy/blob/396ca727080776bd313bb892423b7d94e03b81b4/crates/bevy_ecs/src/system/system_registry.rs#L842-L878","documentation":"RegisteredSystemError::Skipped: the cached/stored system did not run because one of its system parameters failed validation (e.g. a required resource missing or an invalid param). This is informational — the system was skipped, not broken.","triggerScenarios":"Thrown at crates/bevy_ecs/src/system/system_registry.rs:860 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Inspect the inner SystemParamValidationError to see which parameter failed","Ensure required resources/params are initialized before running the system (e.g. app.init_resource)","Treat Skipped as non-fatal and continue the frame"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"396ca727080776bd313bb892423b7d94e03b81b4","analyzedAt":"2026-08-20T16:12:39.808Z","contentChangedAt":"2026-08-20T16:12:39.808Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}