The following error occurs when using a CRL (Custom Record Layout) member in CA File Master for MVS:
Error parsing layout member CRLMBR1, Line 00127.
More than 100 non-comment records found without a period.
One possible reason could be that the very first line was changed by a user or another application, somehow.
Even if only "Custom Record Layout" was changed to upper case "CUSTOM RECORD LAYOUT" - no single change by any external tool is supported and it needs to be changed back to the exact originally CA File Master format.