A customer site has been using HSM and CA-1 for almost 10 years without
serious problems.  For some reason, recent attempts to recycle some
backup tapes are running into some strange and probably related
problems:

        HSM recycle task is abending with a S0C4 in an unknown module.

        Entry in the CA-1 TMC for the tape to be recycled starts out as
a normal EDM tape and suddenly changes to WORM (FLAG5 = X'18') and loses
both the EDMID and the EDM bit in FLAG2.

        CA-1 generates an IECTMS14 message regarding the tape being
ineligible for EDM.

I recycled almost 30 tapes without incident on 28 Feb.  Problems started
on 1 Mar (yesterday as site is in Japan).  Only tapes used at the site
are 3490 cartridges, no WORMs.

Suggestions welcome.

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