0xc000007b — The application was unable to start correctly A 32/64-bit mismatch between the application and a library it loads.
Work through these in order
- Install the matching redistributable architecture
- Check the DLL bitness with dumpbin
- Reinstall the application to match the OS
One thing to keep in mind
Install both x86 and x64 redistributables on a design workstation.
Before changing anything
The code above is what an application reports; it is not a diagnosis of what went wrong. Two checks are worth doing before permissions are touched: whether the file is on a volume the application can actually reach, and whether the file was moved or renamed since it was last opened. Both report as this code more often than a permission problem does.
Pages in this section describe the code as applications report it. Where a fix is listed here, it is one the library has seen work on a real file; where nothing has been confirmed, the page says so instead of guessing at a cause.
Reviewed 2026-10-05 by R. Okonkwo.