1) do not see any surveyfreq code so not sure what the question is about surveyfreq.
2) If you use this type of code often: data usee; set usee; then you are completely replacing the Usee data set every time it executes without a syntax error. Which means that data manipulation logic problems
3) your second set of code is using a different data set: data use; set use;
So which data set did you use for analysis?
4) You ask : how can i make table ff_use '0'. What table?
I strongly suggest that you share the LOG from running your code. The Log often shows details that are important for diagnosing things. Run your code, copy the log with all the code and messages then on the forum open a text box using the </> icon that appears above the message window and paste the text. The text box is important to maintain text formatting as the message windows on this forum will reformat text.
There really is no reason to provide 2 Mbyte files for examples. Better is to provide data step code that generates data sets because I get language character conversion issues.
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