It seems odd to me that SAS Metadata Server allows what it seems to deem must be a unique key to have duplicates in the first place. If it matters to the extent that specific error generation occurs, then it suggests to me that there should be a uniqueness constraint. This is a legacy of SAS origins in a time when every SAS user had a separate SAS process. If you used the libref "MYLIB" and I used the libref "MYLIB" our separate sessions kept us safe. Leonid, it is nice of you to help us with little tools that we can use, but this is really a design issue that SAS should resolve.