ERROR_UNDEFINED_CHARACTER - 583 (0x247)
The Unicode character is not defined in the Unicode character set installed on the system.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_UNDEFINED_CHARACTER with the numeric value 583 and hexadecimal representation 0x247 indicates that a Unicode character was encountered which is not defined in the current system's installed Unicode character set.
Error Details
This error typically arises when an application attempts to process or display a Unicode character that is not supported by the system. The system may lack the necessary font, code page, or other resources required to interpret and render this specific character correctly.
Usage Context
The ERROR_UNDEFINED_CHARACTER can occur in various scenarios where Unicode characters are involved, such as text processing, file operations, or user interface interactions that handle non-ASCII characters. It is important for developers to ensure that their applications are compatible with the full range of Unicode characters they might encounter.
Developer Interpretation
When encountering this error, it suggests that there is a mismatch between the character being processed and the system's current configuration. Developers should verify that all necessary fonts and code pages are installed and correctly configured to support the required Unicode characters. Additionally, applications should handle such errors gracefully by providing fallback mechanisms or user notifications.
Related Errors
- ERROR_INVALID_PARAMETER: Indicates an invalid parameter was passed to a function, which might be related if the character is not properly defined in the system's parameters.
- ERROR_FILE_NOT_FOUND: May occur if the file containing the undefined character cannot be accessed due to missing resources or permissions.
FAQ
Q: What does ERROR_UNDEFINED_CHARACTER mean?
A: It means that a Unicode character was encountered which is not defined in the system's installed Unicode character set.
Q: How can I resolve this error?
A: Ensure all necessary fonts and code pages are installed, and verify that your application handles undefined characters gracefully.
Summary
The ERROR_UNDEFINED_CHARACTER (583) indicates an issue with a Unicode character not being defined in the system's current configuration. Developers should ensure their applications handle such cases appropriately to maintain robustness and user experience.