# MATLAB on OOD 3.1: App has not been initialized or does not exist

**URL:** <https://discourse.openondemand.org/t/matlab-on-ood-3-1-app-has-not-been-initialized-or-does-not-exist/3809>\
**Category:** Get Help\
**Tags:** question\
**Created:** [October 11, 2024, 9:02pm UTC](https://discourse.openondemand.org/t/matlab-on-ood-3-1-app-has-not-been-initialized-or-does-not-exist/3809 "2024-10-11T21:02:48Z")\
**Posts on this page:** 1\
**Showing post:** 29

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**Author:** ![SomePersonSomeWhereI](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/somepersonsomewherei/32/2147_2.png) [@SomePersonSomeWhereI](https://discourse.openondemand.org/u/SomePersonSomeWhereI)\
**Post date:** [October 16, 2024, 6:37pm UTC](https://discourse.openondemand.org/t/matlab-on-ood-3-1-app-has-not-been-initialized-or-does-not-exist/3809/29 "2024-10-16T18:37:55Z")

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> [@jeff.ohrstrom](#):
>
> > [@SomePersonSomeWhereI](#):
> >
> > `This app does not supply a sub app form file under the directory '/var/www/ood/apps/sys/bc_desktop/local'`
> > 
> > Where is this coming from? @jeff.ohrstrom any idea where I can search?
> 
> How are you navigating there? There should be a link in the navigation bar for you to use. I think you can run into this if the URL is slightly mis-constructed or if the app is irregular somehow.

OK this error only happens after the initial login then goes away. We are using CAS and it’s similar to this [2020 RStudio thread](https://discourse.openondemand.org/t/rstudio-app-works-but-each-session-begins-with-a-single-auth-failure-that-must-be-ignored/660). I tried adding `CASScope` to out conf file but get:

```auto
Oct 16 14:30:41 ood.ouruni.edu httpd[1402821]: AH00526: Syntax error on line 17 of /etc/httpd/conf.d/cas.conf:
Oct 16 14:30:41 ood.ouruni.edu httpd[1402821]: CASScope not allowed here

```

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