[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-09-04。"],[],[],null,["# Troubleshoot managing deployed agents\n\nThis document describes how to resolve errors that you might encounter when\n[managing deployed agents](/vertex-ai/generative-ai/docs/agent-engine/manage/overview).\n\nError when filtering the list of agents\n---------------------------------------\n\n**Issue**:\n\nYou receive an error message similar to the following: \n\n InvalidArgument: 400 Provided filter is not valid.\n\n**Possible cause**:\n\nYour filter isn't formatted properly.\n\n**Recommended solution**:\n\nUpdate the formatting of your filter so it's formatted correctly. For example,\nyou might be using the following to filter by display name. This filter isn't\nformatted correctly because it's missing quotation marks: \n\n from vertexai import agent_engines\n\n agent_engines.list(filter=f'display_name={DISPLAY_NAME}')\n\nIn this case, enclose `{DISPLAY_NAME}` in double-quotation marks: \n\n from vertexai import agent_engines\n\n agent_engines.list(filter=f'display_name=\"{DISPLAY_NAME}\"')"]]