We have the adbindproxy installed on the same os build AIX 7100-05 and it works without the issue like yours.
The document missed the steps to untar and gunzip unextracted files from step 1 and you are correct to tar -xvf and gunzip those files with commands.
May I know the exact installp command used in your env?
- Is it "installp -aY -d centrifydc-adbindproxy-5.4.0-aix6.1-ppc-bff CentrifyDC.adbindproxy"?
Can you 'ls -al' the folder contents with the -bff file generated?
Can you send us the output when executing the installp command with receiving the error "0503-436... could not be accessed"?
Thanks,
Amy