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Get around ‘WARNING: Fisher’s exact test is not computed when the total sample size exceeds 32767.’

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Fisher’s Exact test can be memory and computation extensive when the sample size is large. For the large sample size problem, you can use Monte-Carlo estimates of the exact p-value to get around the issue. For example,
exact fisher /mc;
More details of the MC option can be found here –

http://support.sas.com/documentation/cdl/en/statug/67523/HTML/default/viewer.htm#statug_freq_syntax03.htm#statug.freq.freqexfisher

This post was kindly contributed by SAS & Statistics - go there to comment and to read the full post.