Update dataset compulsorily

NOTE: SAS set option OBS=0 and will continue to check statements. This may cause NOTE: No observations in data set.

Are you familiar with this note? It is common note when SAS run gets error. After the error, SAS macro can run, but it will not create/update any SAS dataset.
However, if you really want to change data, you can set two system options: OBS=MAX and NOSYNTAXCHECK.