For a cell with no observations, the standard error cannot be computed. This is also true for the design effect and the covariances for that cell. So the chi-squares (formulas given in the documentation) are also undefined. http://support.sas.com/documentation/cdl/en/statug/65328/HTML/default/viewer.htm#statug_surveyfreq_details46.htm For the time being, if you want SurveyFreq to do the computations and you want to use zero as the standard error/design effect/covariance for the missing cells, you can do the following: Construct a dataset that has one observation for each missing table cell, and assign a small weight (relative to the real survey weights) to each of these observations. Merge that dataset with the analysis dataset. Due to the small weights, these additional observations should not affect the estimates of proportions and totals -- but will give the formerly missing cells one observation each, and standard errors of zero, and SurveyFreq will compute the chi-squares.
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