I currently working on transforming data which has (negative and 0 ) values into normally distributed data using BOX COX transformation with PROC TRANSREG, but I am encountering an error in the log window ERROR in SAS ENTERPRISE Ordinary missing values were found or an UNTIE transformation or the UNTIE= option was specified. The utility of the hypothesis tests are dubious since one parameter must be estimated for each of these values. If you really want to do this, ensure that no observations are duplicated -- combine duplicate observations and use a FREQ statement. If you do not, the parameter count may be too large and the tests overly conservative. However, it is best to avoid this situation altogether. Can anyone help me resolve this issue ? Thanks Anusha
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