Hi Abe and Pieter Thank you for your replies. "I hope you're using CS on the ST of the pointer to the obtained area." Sorry for my newbie question but what means CS and ST ?
"Most areas that are shared have a documented serialization requirement." I didn't see anything about serialization (or I misunderstood it) in the documentation and in the SYS1.MACLIB(IFAEXITP) https://www.ibm.com/docs/en/zos/2.5.0?topic=exits-iefu86-smf-record-exit#IEFU86__pspu86 It works well with my own Storage Obtain/Release but if the provided workarea can be used, it should be better. Guillaume
