1. In the future, please don't reopen a thread from 5 years ago. Open your own thread if you have a question.
2. Always include the SAS log so that we know what you mean by "SAS indicates that the file diffs can not be created".
Presumably, you are getting a warning such as
WARNING: Output 'diffs' was not created.
This warning appears because you are not displaying a table called 'diffs'. Consequently, your ODS OUTPUT statement cannot find a table from which to create a data set.
You are directly creating a SAS data set 'calc_lsd' that contains the information you need. I think you can simply delete the ODS OUTPUT statement.
