We are aware of various limitations with 20-bit support in USING, including dependent USING, which were previously discussed on this list in 2012.
A workaround for this specific case is to subtract some value from both addresses so that the matching offset lies within the 12-bit addressable range, for example as follows: USING TinyArea-4000,Byte-4000 It would have been possible for HLASM to provide a simple fix for the 20-bit dependent USING case but we were holding it back because we felt that compatibility considerations could limit our options for a more general solution which was being designed at the time, but which never got approved because of concerns that it would require incompatible changes to the USING headers, the USING map and the corresponding ADATA records. Perhaps we should go ahead with the simple fix anyway. I'll try to schedule another look at that item some time soon. Jonathan Scott IBM Hursley, UK
