By way of a test, I hid the old libc_a and still it all worked.
When I ran 'slb -t ram1_lis libc_a', I could find no evidence of
your missing name.
Christopher Cave
I looked for RELOC (in case it was STRT not START or some other variant) by using qmon with
f 'reloc' <address where I had loaded the various versions of LIBC_A I was looking at>
There were two RELOCs but not remotely like RELOC_START.
RELOC_START sounds like something a linker needs to do with all C68 programs, since they all have absolute addresses between modules, not PC relative ones.
George