# \#persistence

**URL:** https://forum.opencv.org/tag/persistence/430.md

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## [Some problems with old OpenCV library and haarcascade](https://forum.opencv.org/t/some-problems-with-old-opencv-library-and-haarcascade/20899)

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**Author:** [@RedCat](https://forum.opencv.org/u/RedCat)\
**Replies:** 3\
**Last updated:** [April 27, 2025, 12:47am UTC](https://forum.opencv.org/t/some-problems-with-old-opencv-library-and-haarcascade/20899 "2025-04-27T00:47:55Z")

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Hi to all, I’m trying to run face recognition on an old version of the OpenCV library, but when uploading a file haarcascade\_frontalface\_alt.xml the library returns an error with the cvLoad function: OpenCV Error: Unsp…