BLOCK keyword is required for parent file used by LIKEFILE keyword; BLOCK(*NO) is assumed.
30
Cause . . . . . : When a file is specified as the argument for the LIKEFILE keyword, the blocking attribute for the file must be specified by the File specification, either by the nature of the file, or by the BLOCK keyword. BLOCK(*NO) is assumed for the file.
Recovery . . . : Add the BLOCK keyword to the file that is used as a basis for LIKEFILE definitions where the blocking attribute cannot be determined by the File specification.