okay that with il and 0o i understand but if i change the sourcecode with other since it dont work. is it maybe possible to leave the 8 and 9 and add an 0 like "01234567ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
That's not possible. The base58 encoding is like an alphabet, it cannot be changed because that's how it's defined in the BIP for it and also the various encoders out there would not be patched for such a change in letters.
for the octal numbers if someone read this and have knowledge please let me know.
It's technically possible but why would you want to do that though? Octal numbers take up more space to spell out on the command line and also in output.