A user ran BDFIn (BDF2AIPS) to a disk in which he had UV files in catalog slots 1-10 and 12. It wrote all the table files including the CA entry to slot 11 as one would expect. However, it wrote the UV data themselves to a file UVD00D001.uuu\; slot 13. The user did not notice until all UVCOPs to that disk failed for a disk file in the way. Cheers, Eric