cannot marshal None unless allow_none is enabled
今天运行一个launch文件的时候出现了以下报错 load_parameters: unable to set parameters (last param was [/robot_state_publisher/publish_frequency=20.0]): cannot marshal None unless allow_none is enabled 原因是我之前写一个arbotix配置
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相关文章
- 1. Development cannot be enabled while your device is locked.
- 2. `if not x:` 和`if x is not None:`和`if not x is None:`
- 3. ORA-38709: Recovery Area is not enabled.
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- 8. jade-if-else-unless-case
- 9. The server rejected the connection: None of the protocols are enabled
- 10. Unity3D---Vuforia is not enabled解决方案