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Maximum number of cases in an SPSS dataset
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Technote (troubleshooting)
Problem(Abstract)
What is the maximum number of cases that I can have in an SPSS dataset?
Resolving the problem
SPSS 32 bit can hold up to 2 billion cases in a dataset.
SPSS 64 bit has no real limitation except the specifications of your computer.
The exact number and its calculation is arrived at in the following way.
The file format includes a count of the cases in a 32-bit signed integer. Since one bit is devoted to the sign, the largest number that can be stored there is 2**(31)-1 (2 to the 31st power minus one), or 2,147,493,647.
Remember that the operating system probably keeps the size of each file in bytes in the same kind of integer, so users will likely run into that limit before they hit ours.
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