# System status app

**URL:** <https://discourse.openondemand.org/t/system-status-app/1129>\
**Category:** Get Help\
**Created:** [September 24, 2020, 8:12pm UTC](https://discourse.openondemand.org/t/system-status-app/1129 "2020-09-24T20:12:10Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![mcuma](https://sea1.discourse-cdn.com/flex015/user_avatar/discourse.openondemand.org/mcuma/32/171_2.png) [@mcuma](https://discourse.openondemand.org/u/mcuma)\
**Post date:** [September 25, 2020, 10:30pm UTC](https://discourse.openondemand.org/t/system-status-app/1129/5 "2020-09-25T22:30:37Z")

</div>

I am trying to add a few customizations, and I am stuck with the lack of knowledge of how the arguments are passed from the lib/slurm\_squeue\_client.rb to the views/\_node\_status.erb.

I am adding a few more variables to the cluster (a.k.a. showqer) object in the slurm\_squeue\_client.rb, e.g.  
…  
nodes\_other: sinfo\_out[6].to\_i,  
…  
self.nodes\_other = cluster\_info[:nodes\_other]  
…

And then adding the “nodes\_other” = “offline” to the \_node\_status.erb

\<%= showqer.nodes\_used %\> of \<%= showqer.available\_nodes %\> Nodes Active (\<%= showqer.available\_nodes - showqer.nodes\_used - showqer.nodes\_other%\> Nodes Free) 

But when I run the app, I get error like:  
NoMethodError at /pun/dev/osc-systemstatus/clusters  
undefined method `friendly\_error\_message’ for nil:NilClass

though the friendly\_error\_message is defined in the cluster class.

Any thoughts on that? I was thinking perhaps there’s some formatting issue but looking at the slurm\_squeue\_client.rb I don’t see any.

Thanks,  
MC

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