# CascadeClassifier Assertion failed !empty

**URL:** https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957
**Category:** Python
**Created:** [January 19, 2021, 8:50pm UTC](https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957 "2021-01-19T20:50:46Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Flavia\_Iulia](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/flavia_iulia/32/623_2.png) [@Flavia\_Iulia](https://forum.opencv.org/u/Flavia_Iulia)
#### Post date: [January 19, 2021, 8:50pm UTC](https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957/1 "2021-01-19T20:50:47Z")

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Hello! i have a problem with my code. when i run it (vs code) i have this error faces= face\_cascade.detectMultiScale(gray\_img, scaleFactor=1.05,minNeighbors=5)  
cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-wvn\_it83\opencv\modules\objdetect\src\cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function ‘cv::CascadeClassifier::detectMultiScale’. Can somebody tell me what i do wrong?

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### Author: ![laurent.berger](https://avatars.discourse-cdn.com/v4/letter/l/ec9cab/32.png) [@laurent.berger](https://forum.opencv.org/u/laurent.berger)
#### Post date: [January 20, 2021, 11:16am UTC](https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957/2 "2021-01-20T11:16:24Z")

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face\_cascade model seem empty. check path to model

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### Author: ![furas](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/furas/32/706_2.png) [@furas](https://forum.opencv.org/u/furas)
#### Post date: [January 23, 2021, 5:48am UTC](https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957/3 "2021-01-23T05:48:38Z")

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If you read it from file then first try `/full/path/to/file/with/model` because it may run code in different folder then you expect and it may not find file with model.

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### Author: ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)
#### Post date: [January 24, 2021, 11:47am UTC](https://forum.opencv.org/t/cascadeclassifier-assertion-failed-empty/957/4 "2021-01-24T11:47:08Z")

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A post was split to a new topic: [CascadeClassifier is empty](https://forum.opencv.org/t/cascadeclassifier-is-empty/1087)