Description:
The abend S66D is caused by the PUTGET macro in any code for the tso environment to now REQUIRE a UPT address in the first fullword of the IOPL parameter list.
Solution:
At z/OS 2.1 level, IBM are now enforcing the requirement for the UPT address to be in the first word of the IOPL parameter list for the PUTGET MACRO.
Prior to z/OS 2.1 the requirement was not enforced and would not cause any abend if word1 did not contain the UPT address.