ERROR_DLL_NOT_FOUND - 1157 (0x485)
One of the library files needed to run this application cannot be found.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_DLL_NOT_FOUND error, with the numeric code 1157 and hex code 0x485, indicates that a required dynamic-link library (DLL) file is missing from the system. This error typically occurs when an application attempts to load a DLL that does not exist or cannot be located.
Error Details
The ERROR_DLL_NOT_FOUND error is a generic return code used by various Windows APIs and functions. It signifies that the operating system was unable to locate a required DLL file, which can prevent the application from starting or performing certain operations successfully.
Usage Context
This error can occur in different contexts within an application, such as during startup, when loading resources, or when attempting to execute specific functionality that relies on external libraries. The error is often encountered in scenarios where a required DLL file has been deleted, moved, or corrupted, leading to the failure of the application.
Developer Interpretation
When encountering ERROR_DLL_NOT_FOUND, developers should interpret it as an indication that a necessary component (DLL) is missing from the system. This can be due to various reasons such as incorrect installation, file deletion, or corruption. Developers should ensure that all required DLL files are present and correctly installed in the application's directory or within the system’s PATH environment variable.
Related Errors
ERROR_FILE_NOT_FOUND(2)ERROR_PATH_NOT_FOUND(3)ERROR_MOD_NOT_FOUND(126)
FAQ
Q: What does the ERROR_DLL_NOT_FOUND error mean?
A: It indicates that a required DLL file is missing or cannot be located by the application.
Q: How can I resolve this error?
A: Ensure all necessary DLL files are present and correctly installed. Check the application's directory for missing files, and verify that the system PATH environment variable includes the correct paths to these files.
Summary
The ERROR_DLL_NOT_FOUND error is a generic return code used by Windows APIs when an application attempts to load a required DLL file that does not exist or cannot be located. Developers should ensure all necessary components are present and correctly installed to avoid this error.