{"record":{"id":"e17d4ca4f0c7434e","repo":"astral-sh/uv","slug":"tool-command-could-not-be-parsed-as-utf-8-string","errorCode":null,"errorMessage":"Tool command could not be parsed as UTF-8 string. Use `--from` to specify the package name","messagePattern":"Tool command could not be parsed as UTF-8 string\\. Use `--from` to specify the package name","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/uv/src/commands/tool/run.rs","lineNumber":157,"sourceCode":"        Vec::new()\n    } else {\n        read_env_files(env_file.iter())?\n    };\n\n    let Some(command) = command else {\n        // When a command isn't provided, we'll show a brief help including available tools\n        show_help(invocation_source, &cache, printer).await?;\n        // Exit as Clap would after displaying help\n        return Ok(ExitStatus::Error);\n    };\n\n    let (target, args) = command.split();\n    let Some(target) = target else {\n        return Err(anyhow::anyhow!(\"No tool command provided\"));\n    };\n\n    let Some(target) = target.to_str() else {\n        return Err(anyhow::anyhow!(\n            \"Tool command could not be parsed as UTF-8 string. Use `--from` to specify the package name\"\n        ));\n    };\n\n    if let Some(ref from) = from {\n        if has_python_script_ext(Path::new(from)) {\n            let package_name = PackageName::from_str(from)?;\n            return Err(ToolRunScriptError::FromScript {\n                package_name,\n                target: target.to_string(),\n                invocation: invocation_source,\n            }\n            .into());\n        }\n    } else {\n        let target_path = Path::new(target);\n\n        // If the user tries to invoke `uvx script.py`, hint them towards `uv run`.","sourceCodeStart":139,"sourceCodeEnd":175,"githubUrl":"https://github.com/astral-sh/uv/blob/f1a42680ff5272232d65748acf338b19778dde24/crates/uv/src/commands/tool/run.rs#L139-L175","documentation":"Error \"Tool command could not be parsed as UTF-8 string. Use `--from` to specify the package name\" thrown in astral-sh/uv.","triggerScenarios":"Thrown at crates/uv/src/commands/tool/run.rs:157 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"f1a42680ff5272232d65748acf338b19778dde24","analyzedAt":"2026-08-16T04:51:47.599Z","schemaVersion":2},"datasetVersion":"2026-08-16T08:17:34.114Z"}