# Is slicer 5.6.x or 5.7.x supported on Red Hat Enterprise Linux release 8.10 (Ootpa)

**URL:** <https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843>\
**Category:** Support\
**Created:** [June 17, 2024, 7:01pm UTC](https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843 "2024-06-17T19:01:34Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![RonK](https://avatars.discourse-cdn.com/v4/letter/r/bbce88/32.png) [@RonK](https://discourse.slicer.org/u/RonK)\
**Post date:** [June 17, 2024, 7:01pm UTC](https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843/1 "2024-06-17T19:01:34Z")

</div>

Receiving the following error for both 5.6.2 and 5.7.0

```auto
# export QT_DEBUG_PLUGINS=1
# ./Slicer
 Error: BadAccess (attempt to access private resource denied) 10
  Extension: 131 (MIT-SHM)
  Minor opcode: 1 (X_ShmAttach)
  Resource id: 0x106
X Error: BadShmSeg (invalid shared segment parameter) 128
  Extension: 131 (MIT-SHM)
  Minor opcode: 5 (X_ShmCreatePixmap)
  Resource id: 0x2e0000c
X Error: BadDrawable (invalid Pixmap or Window parameter) 9
  Major opcode: 62 (X_CopyArea)
  Resource id: 0x2e0000d
/usr/local/Slicer-5.6.2-linux-amd64/bin/SlicerApp-real: symbol lookup error: /lib64/libk5crypto.so.3: undefined symbol: EVP_KDF_ctrl, version OPENSSL_1_1_1b
X Error: BadPixmap (invalid Pixmap parameter) 4
  Major opcode: 54 (X_FreePixmap)
  Resource id: 0x2e0000d
X Error: BadShmSeg (invalid shared segment parameter) 128
  Extension: 131 (MIT-SHM)
  Minor opcode: 2 (X_ShmDetach)
  Resource id: 0x2e0000c

```

---

<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:** [June 17, 2024, 7:14pm UTC](https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843/2 "2024-06-17T19:14:26Z")

</div>

It seems that your system has some problem with the MIT-SHM (MIT Shared Memory Extension) X11 extension. You may need to disable this X11 extensions to use Qt applications, such as Slicer. See for example [this page](https://stackoverflow.com/questions/50605433/running-pyqt-with-root-privilege) for details.

Let us know if this launches Slicer correctly on your system:

```auto
export QT_X11_NO_MITSHM=1
./Slicer

```

---

<div class="post-metadata">

**Author:** ![RonK](https://avatars.discourse-cdn.com/v4/letter/r/bbce88/32.png) [@RonK](https://discourse.slicer.org/u/RonK)\
**Post date:** [June 17, 2024, 7:28pm UTC](https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843/3 "2024-06-17T19:28:13Z")

</div>

```auto
# export QT_X11_NO_MITSHM=1
# export QT_DEBUG_PLUGINS=1
[root@fchredhattst01 Slicer-5.6.2-linux-amd64]# ls
bin include lib libexec resources share Slicer
[root@fchredhattst01 Slicer-5.6.2-linux-amd64]# ./Slicer
QFactoryLoader::QFactoryLoader() ignoring "com.trolltech.Qt.QInputContextFactoryInterface" since plugins are disabled in static builds 
QFactoryLoader::QFactoryLoader() ignoring "com.trolltech.Qt.QStyleFactoryInterface" since plugins are disabled in static builds 
QFactoryLoader::QFactoryLoader() ignoring "com.trolltech.Qt.QImageIOHandlerFactoryInterface" since plugins are disabled in static builds 
/usr/local/Slicer-5.6.2-linux-amd64/bin/SlicerApp-real: symbol lookup error: /lib64/libk5crypto.so.3: undefined symbol: EVP_KDF_ctrl, version OPENSSL_1_1_1b

```

---

<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:** [June 17, 2024, 7:37pm UTC](https://discourse.slicer.org/t/is-slicer-5-6-x-or-5-7-x-supported-on-red-hat-enterprise-linux-release-8-10-ootpa/36843/4 "2024-06-17T19:37:39Z")

</div>

It seems that you have run into this issue: [Crash on Fedora 33 due to OpenSSL/Kerberos incompatibility · Issue #5663 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/issues/5663)

Please follow the suggestions described on that page and let us know what solution ended up working for you.

You probably don’t need `QT_DEBUG_PLUGINS=1`. You can remove it to avoid noise.