That seems to not have been updated correctly.

Should probably be:
tpm2_evictcontrol -c ak.ctx 0x81010002
or
tpm2_evictcontrol -C o -c ak.ctx 0x81010002

Maybe you could try this and if it works, make a PR with the update to the tools project.

Thanks,
Andreas

________________________________
From: Alexander Lieb [alexander.lieb(a)online.de]
Sent: Friday, January 10, 2020 13:36
To: tpm2(a)lists.01.org
Subject: [tpm2] Some Errors

Hi,

I tried to make my ak persistent, usign the following readme:

https://github.com/tpm2-software/tpm2-tools/blob/master/man/tpm2_createak.1.md

The first two commands work fine, the last one results into:

tpm2_evictcontrol -c 0x81010002 -o ak.ctx

WARNING:esys:src/tss2-esys/api/Esys_ReadPublic.c:320:Esys_ReadPublic_Finish() Received TPM Error
ERROR:esys:src/tss2-esys/esys_tr.c:231:Esys_TR_FromTPMPublic_Finish() Error ReadPublic ErrorCode (0x0000018b)
ERROR:esys:src/tss2-esys/esys_tr.c:321:Esys_TR_FromTPMPublic() Error TR FromTPMPublic ErrorCode (0x0000018b)
ERROR: Esys_TR_FromTPMPublic(0x18B) - tpm:handle(1):the handle is not correct for the use
ERROR:esys:src/tss2-esys/esys_tr.c:357:Esys_TR_Close() Error: Esys handle does not exist (70018).
ERROR: Esys_TR_Close(0x70018) - esapi:0x18
ERROR: Unable to run tpm2_evictcontrol


I am not sure, whether I need to run any cmd to allocate the handle, or if it is necessary to be in a special mode or sth. Can you help me with this issue? Thanks a lot.

Best regards