ERROR_IMAGE_AT_DIFFERENT_BASE - 807 (0x327)
An image file was mapped at a different address from the one specified in the image file but fixups will still be automatically performed on the image.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_IMAGE_AT_DIFFERENT_BASE error code indicates that an image file, such as a DLL or EXE, was loaded into memory at a different base address than the one specified in the file's header. Despite this discrepancy, fixups will still be automatically performed on the image to ensure its correct operation.
Error Details
This error typically occurs during the process of loading an executable or dynamic link library (DLL) where the actual load address does not match the expected address as defined by the file itself. The operating system performs necessary adjustments to align the loaded module with its intended functionality.
Usage Context
The ERROR_IMAGE_AT_DIFFERENT_BASE error is relevant in scenarios involving dynamic loading of modules, such as when a program or service attempts to load an external library or executable. It can also arise during debugging or when dealing with custom loaders that may alter the expected base address.
Developer Interpretation
Developers should be aware that this error does not necessarily indicate a failure in the operation; rather, it signifies that the image was loaded at an unexpected location. The system will attempt to correct any necessary fixups automatically, ensuring the module functions correctly despite the mismatched addresses.
Related Errors
ERROR_BAD_EXE_FORMAT(532): Indicates that the file is not a valid executable or DLL.ERROR_INVALID_IMAGE_FORMAT(193): Suggests issues with the image format itself, which could lead to unexpected base address mappings.
FAQ
Q: What does ERROR_IMAGE_AT_DIFFERENT_BASE mean?
A: It indicates that an image file was loaded into memory at a different base address than specified in its header, but fixups will still be performed automatically.
Q: Is this error critical?
A: No, the system handles the discrepancy and performs necessary adjustments to ensure correct operation of the module.
Summary
The ERROR_IMAGE_AT_DIFFERENT_BASE error code is a specific technical indicator that an image file was loaded at an unexpected base address. While it may indicate an unusual scenario, the operating system will handle any required fixups to maintain proper functionality.