0x80070057 — The parameter is incorrect The caller passed a value the API cannot use — most often a size or path that is out of range.
What to try
- Enable long paths or shorten the folder path
- Fill every field before starting the conversion
- Reduce the image dimensions below the format limit
One thing to keep in mind
Keep project paths short; deep folder trees are the classic cause.
Checked 2026-10-05 — R. Okonkwo.
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.