ERROR_RESIDENT_FILE_NOT_SUPPORTED - 334 (0x14E)
An operation is not supported on a resident file.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_RESIDENT_FILE_NOT_SUPPORTED error code indicates that a specific operation cannot be performed on a resident file within the Windows operating system. Resident files are those that are stored in memory and not on disk, often used for caching or temporary storage.
Error Details
This error typically arises when an API call attempts to perform an unsupported operation on a resident file. The exact nature of the unsupported operation can vary depending on the specific function being called. Common operations that may trigger this error include attempting to modify the file's metadata, change its location, or perform certain read/write operations.
Usage Context
This error is encountered in scenarios where an application or system component attempts to interact with a resident file using APIs that do not support such interactions. For example, if an API function expects a file on disk but encounters a resident file, it will return this error code.
Developer Interpretation
Developers should interpret this error as indicating that the operation they are attempting is not supported for resident files in the context of the current API call. This could mean that the operation requires a physical file on disk rather than a memory-resident one. Developers must ensure that their operations align with the capabilities and constraints of the APIs they use.
Related Errors
ERROR_INVALID_FUNCTION(0x1)ERROR_NOT_SUPPORTED(0x80040154)
FAQ
Q: What does ERROR_RESIDENT_FILE_NOT_SUPPORTED mean?
A: It indicates that an operation is not supported on a resident file.
Q: How can I resolve this error?
A: Ensure that the operation you are attempting is compatible with resident files. If it is not, consider using alternative APIs or methods that support such operations.
Summary
The ERROR_RESIDENT_FILE_NOT_SUPPORTED error code is a specific indication of an unsupported operation on a resident file within Windows API calls. Developers must ensure their operations align with the capabilities and constraints of the APIs they use to avoid this error.