So when I try to change one of my variables in a data set (397 observations), it deletes the entire data set. I am not sure what im doing wrong, but I am constantly running into the same problem. I made a copy of the original data set so I would not erase the original. Here is my code:   data cat.pat93; set cat.pat92; run;   data cat.pat93; set cat.pat93; fldVL_1_numeric=input(fldVL_1,best5.); run;   Proc contents of cat.pat92          Proc contents of cat.pat93     ... View more