title: SPSS gets me ' Set to system missing due to overflow'
body: <p>I am generating a multivariable regression analysis from the Generalized Linear Model tab in SPPS for a binomial dependent outcome variable (mortality). I included several factors and covariates in the model. </p>
  
  <p>However, for some reason the factor ASA (coded as 1, 2, 3 or 4) gives a specific comment in the generated table: 'Set to system missing due to overflow'. Although I could generally ignore it and use the adjusted p-value and confidence intervals for the odds ratios, it gives me problems when I try to generate estimated marginal means from the model; these become rather low. If I omit ASA from the model, the estimated marginal means become better, although it does have impact on the significance and confidence intervals. </p>
  
  <p>I have tried recoding ASA into ASA1, ASA2, ASA3 and ASA4 and running the model again with these 4 variables instead of only ASA. These gave the identical outcomes and problem. </p>
  
  <p>I hope it may be something arbitrary. Is there anyone who had a likewise problem and what would be the solution?</p>
  
  <p>Thank you!</p>