title: Cannot run glmer models with na.action=na.fail, necessary for MuMIn dredge function
body: <p>Mac OS 10.9.5, R 3.2.3, MuMIn_1.15.6, lme4_1.1-10</p>
  
  <p>Reproducible <a href="https://www.dropbox.com/s/3fuek446qmj02u1/error_reprod_code.R?dl=0" rel="nofollow">example code</a>, using <a href="https://www.dropbox.com/s/1kllf7nkkhqjd0n/coldat.txt?dl=0" rel="nofollow">example data</a></p>
  
  <p>The <a href="https://cran.r-project.org/web/packages/MuMIn/MuMIn.pdf" rel="nofollow">MuMIn user guide</a> recommends using <code>na.action=na.fail</code>, otherwise the dredge function will not work, which I have found:</p>
  
  <blockquote>
    <p>Error in dredge: 'global.model''s 'na.action' argument is not set and options('na.action') is "na.omit". </p>
  </blockquote>
  
  <p>However, when I try to run a glmer model with <code>na.action=na.fail</code>, I get this: </p>
  
  <blockquote>
    <p>Error in na.fail.default(list(pr = c(0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1,  : 
      missing values in object</p>
  </blockquote>
  
  <p>Do I have any options other than removing every observation with an NA? My full data set consists of 10,000 observations and has 23 predictor variables which have NAs for different observations. Removing every obs with an NA will waste some data, which I'm looking to avoid.</p>