ERRORDLLNOTFOUND

ERRORDLLNOTFOUND is a Windows error indicating that a required dynamic-link library (DLL) could not be located by the system or an application during loading. It is commonly raised when a program attempts to load a DLL via the Windows API (for example, using LoadLibrary) or when a dependent DLL is needed by an executable but cannot be found in the search path.

Causes of ERRORDLLNOTFOUND include a missing DLL on disk, a DLL not present in the application directory, system folders, or directories listed in the PATH, and architecture mismatches between 32-bit and 64-bit components. It can also result from missing transitive dependencies, a renamed or moved DLL, or security software blocking access to the DLL. Misconfigured application manifests or binding to an incorrect version of a DLL can produce the same error.

Symptoms and scope vary by context but commonly involve failure to start a program, failure to load a plugin or extension, or explicit error messages stating that the module cannot be found. The issue is typically encountered during application startup or when loading a dynamically linked module.

Diagnosis often involves checking the DLL search path and dependencies. Tools such as Dependency Walker or modern equivalents can reveal missing or incompatible dependencies. Event logs, Process Monitor traces, and verification of PATH, App Paths, and the presence of required runtimes are also useful. Verifying architecture compatibility and ensuring that all required DLLs and runtimes are correctly installed can identify the root cause.

Resolutions generally include reinstalling or repairing the affected software, restoring the missing DLL to a correct location (application directory, system directories, or PATH), installing any missing runtime packages, and ensuring compatible 32-bit or 64-bit components. Rebuilding or updating plugins to match the target architecture can also resolve the error.