We have just shipped the PTFs for APAR PH42188 which allows the DROP instruction to identify a USING instruction to be dropped by specifying any implicit address which would be resolved via that USING instruction.
This means for example that you can drop a USING for a DSECT simply by dropping the name of the DSECT, even if it uses more than one base register. You can also drop a specific dependent USING even if it is not labeled by specifying any address which would be resolved by that USING. For details, see the IBM Support page for APAR PH42188: https://www.ibm.com/support/pages/apar/PH42188 As an assembler programmer myself, I have wished for something like this for a very long time. I still have to wait of course until I can be sure that anyone who builds my code will have the appropriate PTF level, but I see this as a useful step forward. Jonathan Scott, HLASM IBM Hursley, UK
