title: Solving SLURM "sbatch: error: Batch job submission failed: Requested node configuration is not available" error
body: <p>We have a 4 GPU nodes with 2 36-core CPUs and 200 GB of RAM available at our local cluster. When I'm trying to submit a job with the follwoing configuration:</p>
  
  <pre><code>#SBATCH --nodes=1
  #SBATCH --ntasks=40
  #SBATCH --cpus-per-task=1
  #SBATCH --mem-per-cpu=1500MB
  #SBATCH --gres=gpu:4
  #SBATCH --time=0-10:00:00
  </code></pre>
  
  <p>I'm getting the following error:</p>
  
  <blockquote>
    <p>sbatch: error: Batch job submission failed: Requested node configuration is not available</p>
  </blockquote>
  
  <p>What might be the reason for this error? The nodes have exactly the kind of hardware that I need...</p>