CTG9274E Memory allocation failure
The CICS® Transaction Gateway application is running in 64-bit mode. The CICS TG attempted to call an internal 31-bit API, but was unable to allocate sufficient storage within the 31-bit address range to pass data to the API.
This message is logged and CICS Transaction Gateway processing continues. If the memory allocation failure prevented an EXCI request from completing, Cics_Rc is set to ECI_ERR_RESOURCE_SHORTAGE.
Configure the system to give the process invoking the CICS TG classes more storage below the 2 gigabyte line. Refer to the z/OS documentation for details on how to do this.