Sample easytrieve prog XCOMEHRP is supplied with XCOM.
How report file use BLKSIZE=0 be used, currently defaults to DCB of LRECL 133 BLKSIZE 133
Release : 11.6
Component : CA Easytrieve Plus Report Generator
XCOMEHRP is a sample program intended to write report to spool, with Easytrieve the option to use BLKSIZE=0 is set in the options table
see the following techdocs and manual links...
https://techdocs.broadcom.com/us/en/ca-mainframe-software/devops/ca-easytrieve-report-generator/11-6/configuring/configure-your-system/updating-the-table/execution-options.html#concept.dita_e75dc3c9cc7a0cfbe2350919fb8ef28e3697e092_BLOCK0zOSonly
https://knowledge.broadcom.com/external/article?articleId=13585