Why does a CHKCERT fail with a new cert, message ACF68025 Error parsing certificate: R15 = 12, reason/TRUNC = 50/00
The 'ACF68025 Error parsing certificate' error is an indication that the certificate file on z/OS is not in the correct format for a certificate. This is most likely caused by FTPing the certificate to z/OS in the wrong format. Depending on how the certificate package was created, it could be in binary format or ASCII format. You may want to trying re-FTPing the certificate in the other format ASCII/BINARY and then re-try the CHKCERT command.