# SlicerOpenCV nightly build failed

**URL:** <https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058>\
**Category:** Development\
**Tags:** opencv, slicerpathology, nightlybuild\
**Created:** [September 15, 2017, 2:05pm UTC](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058 "2017-09-15T14:05:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tdiprima](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/tdiprima/32/9469_2.png) [@tdiprima](https://discourse.slicer.org/u/tdiprima)\
**Post date:** [September 15, 2017, 2:05pm UTC](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058/1 "2017-09-15T14:05:53Z")

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Hi guys,

SlicerPathology depends on SlicerOpenCV… I hope you can help me out.

Here’s [the build error](http://slicer.cdash.org/viewBuildError.php?buildid=1097176).

And it says:

```auto
-- MD5 hash of
    /.../SlicerOpenCV-build/OpenCV-prefix/src/3.1.0.tar.gz
  does not match expected value
    expected: '70e1dd07f0aa06606f1bc0e3fa15abd3'
      actual: 'a0669e22172dfc3225835b180744c9f0'

 Each download failed!

```

Google search indicates a recurring issue that could possibly be resolved with a different CMake version.

Can you guys please help?

Thanks!

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [September 15, 2017, 3:11pm UTC](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058/2 "2017-09-15T15:11:40Z")

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A post was merged into an existing topic: [SlicerOpenCV MD5 hash mismatch](https://discourse.slicer.org/t/sliceropencv-md5-hash-mismatch/1051)

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<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [September 15, 2017, 3:11pm UTC](https://discourse.slicer.org/t/sliceropencv-nightly-build-failed/1058/3 "2017-09-15T15:11:41Z")

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