The MFREXX_LSEQ_RECSIZE_MAX environment variable enables you to specify the record length for the REXX EXECIO command when reading or writing a line sequential file that has been cataloged with a record length of zero.
You should set the environment variable before you start the enterprise server region in the Configuration Information field, on the ESCWA General Properties page, as follows:
[ES-Environment] MFREXX_LSEQ_RECSIZE_MAX=rec-length
Alternatively, you can set in on the command line before you start the enterprise server region:
SET MFREXX_LSEQ_RECSIZE_MAX=rec-length
where rec-length is the record length to use. The default is 255, which is the minimum value you can use. Specifying an invalid value, or a value less than 255, results in the default value being used.