When a user provides an ESTAE-type recovery routine through the ESTAE or ESTAEX macro, the system saves the current linkage stack position. The user must deactivate the ESTAE-type recovery routine under the linkage stack entry that was current when the ESTAE-type recovery routine was activated. z/OS MVS Programming: Authorized Assembler Services Guide describes how the macros that provide recovery for your programs use the linkage stack.