no such instance field
时间: 2023-04-24 21:00:38 浏览: 387
"no such instance field" 的意思是“没有这样的实例字段”。这通常是在编程中出现的错误信息,表示代码中引用了一个不存在的实例字段。可能是拼写错误、变量名错误或者是没有声明该字段。需要检查代码并修正错误。
相关问题
NullReferenceException: Object reference not set to an instance of an object
This error message is commonly encountered in programming when an attempt is made to access a member (property, method, field, etc.) of an object that has not been initialized or set to a value.
In other words, the code is trying to perform an operation on an object reference that is currently null (i.e. has no value). This can occur for a variety of reasons, such as:
- Forgetting to initialize an object before using it
- Passing a null value to a method or constructor that doesn't allow it
- Accessing a property or field of an object that hasn't been instantiated yet
- Trying to call a method on a null object reference
To resolve this error, you need to identify which object reference is null and then ensure that it is properly initialized or assigned a value before attempting to use it. You can use debugging tools like breakpoints or print statements to help you identify where in the code the null reference is occurring.
AttributeError: 'Detector' object has no attribute 'model_path'. Did you mean: 'dll_path'?
The error message "AttributeError: 'Detector' object has no attribute 'model_path'" suggests that there's an attempt to access a property named 'model_path' on an instance of class 'Detector', which does not have such an attribute defined. This could be because the code was expecting 'model_path' to exist, possibly in a similar way to 'dll_path', but it doesn't.
According to the provided references, UnrealBuildTool deprecates the explicit use of RuntimeDependency objects constructed from .build.cs files and recommends adding dependency paths directly[^1]. It implies that when managing dependencies, you might need to ensure your code is updated accordingly to reflect this change.
For Animation Blueprints in Unreal Engine, the changes indicate improvements in exposing types on SkeletalControlBase, allowing subclasses, and addressing issues with CacheBones. However, these details are not directly related to resolving the AttributeError.
To resolve the issue, double-check the following steps:
1. Ensure that 'model_path' is indeed an appropriate attribute for the Detector class. If not, make sure you're using the correct attribute name.
2. Verify if the code accessing 'model_path' is part of an older version that hasn't been updated to the new dependency management method in UnrealBuildTool.
3. If 'model_path' is a legacy field, consider migrating to the recommended approach of managing runtime dependencies by including the path string directly in the relevant configuration.