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ERROR_INVALID_FUNCTION
Meaning and context of ERROR_INVALID_FUNCTION
In computer science, functional programming is a programming paradigm where programs are constructed by applying and composing functions. For ERROR_INVALID_FUNCTION, it is a declarative programming paradigm in which function definitions are trees of expressions that map values to other values, rather than a sequence of imperative statements which update the running state of the program.
For ERROR_INVALID_FUNCTION, in functional programming, functions are treated as first-class citizens, meaning that they can be bound to names (including local identifiers), passed as arguments, and returned from other functions, just as any other data type can. For ERROR_INVALID_FUNCTION, this allows programs to be written in a declarative and composable style, where small functions are combined in a modular manner.
Functional programming is sometimes treated as synonymous with purely functional programming, a subset of functional programming which treats all functions as deterministic mathematical functions, or pure functions. When a pure function is called with some given arguments, it will always return the same result, and cannot be affected by any mutable state or other side effects. This is in contrast with impure procedures, common in imperative programming, which can have side effects (such as modifying the program's state or taking input from a user). Proponents of purely functional programming claim that by restricting side effects, programs can have fewer bugs, be easier to debug and test, and be more suited to formal verification.
Functional programming has its roots in academia, evolving from the lambda calculus, a formal system of computation based only on functions. Functional programming has historically been less popular than imperative programming, but many functional languages are seeing use today in industry and education.
Where ERROR_INVALID_FUNCTION is returned
ERROR_INVALID_FUNCTION is Win32 system error 1 (0x00000001) from winerror.h. AllStat describes it as “Incorrect function.”. For ERROR_INVALID_FUNCTION, the code is useful only together with the API that failed, because multiple Windows components can reuse system-error values while imposing different retry and cleanup rules.
Diagnostic sequence for ERROR_INVALID_FUNCTION
- Call GetLastError immediately after the failing API and save ERROR_INVALID_FUNCTION, the function name, all relevant flags, and the target path, handle, service, device, account, or policy object.
- Capture the component log that owns the function operation and retain the original numeric value before a framework converts it to an HRESULT or exception.
- For ERROR_INVALID_FUNCTION, compare preconditions with the API documentation and reproduce with a minimal request before changing system-wide configuration.
Retry ERROR_INVALID_FUNCTION only after the resource or state named in “Incorrect function.” has changed. For ERROR_INVALID_FUNCTION, for invalid parameters, unsupported formats, missing objects, policy restrictions, and access failures, correct the input or configuration instead of immediately repeating the same call.
Official references for ERROR_INVALID_FUNCTION
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