You can specify the RA2 (or NORA2) option as a parameter of the
ACONTROL statement. For further details, refer to ACONTROL instruction in the HLASM Language Reference.
RA2
Instructs the assembler to suppress error diagnostic message ASMA066W when 2-byte relocatable address constants, such
as AL2(*) and Y(*), are defined in the source program.
NORA2
Instructs the assembler to issue error diagnostic message ASMA066W when 2-byte relocatable address constants, such
as AL2(*) and Y(*), are defined in the source program.