Odd 'invalid argument' error

[Jay Pharis]

I've got a 10.20 system exhibiting some weird behavior. I'm hoping someone can point me to a nice kernel parameter to tweak to fix this, since according to CPM I am up to date on all patches. Anyhoo, here is one way I can always reproduce the errors...
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/home/ops18 >cvs co backoffice

cvs [checkout aborted]: cannot rename file .new.v400.itdsbill.cpy to v400.itdsbill.cpy: Invalid argument
/home/ops18 >cvs co backoffice
? backoffice/copybook/.new.v400.itdsbill.cpy
cvs server: Updating backoffice
cvs server: Updating backoffice/copybook
U backoffice/copybook/v400.itdsbill.cpy

cvs [checkout aborted]: cannot rename file .new.SAMPLES.DAT to SAMPLES.DAT: Invalid argument
/home/ops18 >cvs co backoffice


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This happens on the exact same files every time. I've also run across this issue using tar on this machine, and other commands, such as cp:

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/home/ops18 >cp -R backoffice testdir
cp: cannot create testdir/copybook/v400.itdsbmc1.cpy: Invalid argument
cp: cannot create testdir/scripts/SAMPLES.READ: Invalid argument
cp: cannot create testdir/source/cellisft.cob: Invalid argument
/home/ops18 >cp -R backoffice testdir
cp: cannot create testdir/backoffice/copybook/v400.itdsbmc1.cpy: Invalid argument
cp: cannot create testdir/backoffice/scripts/SAMPLES.READ: Invalid argument
cp: cannot create testdir/backoffice/source/cellisft.cob: Invalid argument
/home/ops18 >cp -R backoffice testdir
/home/ops18>

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This always fails on the same 3 files twice, then works fine the third time. These are not the same files as above.

Anyone have any idea? I've beat myself up trying to figger this one out.

[Pauline Brasch]

Ensure that you have patch PHKL_16751...

[Jay Pharis]

Aye, that patch is installed, as are all the 'Recommended' patches per Custom Patch Manager.