DFS2027I UNABLE TO OPEN VTAM ACB REG15=xx ACBERFLG=yyy.
Explanation
An error code was returned when OPEN ACB was attempted. xx is
the OPEN return code in register 15 and yyy is
the ACB error field returned by VTAM®.
The ACBERFLG value yyy is displayed as a decimal
number.
Important: If you are using multinode persistent
sessions (MNPS), this message only refers to the APPLID ACB.
System action
IMS continues without ACB being opened.
Programmer response
For a detailed explanation of the error codes, see z/OS Communications Server SNA Programming and z/OS Communications Server IP and SNA Codes.