If executing ZCERQUTL while the Alchemist started task is not running, the PREFIX parm is required.
PREFIX specifies the Request data-set prefix. This parm is required if the utility is run while the Alchemist started task is not active. If the started task is active and no PREFIX parm is specified, the utility will attempt to communicate with the started task to identify the Request DSN. If the Alchemist started task is running and PREFIX is specified, the value specified by PREFIX will be used.
Without PTF SU00712 applied, execution of ZCERQUTL without a PREFIX parm while the Alchemist started task is not running will result in the following errors including the garbage REQUEST DSN because communication with the started task was unsuccessful:
IKJ56231I UTILITY DATA SET NOT ALLOCATED, SYSTEM OR INSTALLATION ERROR+
IKJ56231I TEXT UNIT X'0002' CONTAINS INVALID PARAMETER
ZCERQU07E- UNABLE TO ALLOCATE REQUEST DATASET, DYNAMIC ERROR ...~.1~..XCVh....X.REQUEST
With PTF SU00712 applied, this situation is captured and a more appropriate error is provided:
ZCERQU08E- PREFIX MUST BE SPECIFIED WHEN BASE DOWN
This Frequently Asked Question applies to all supported releases of ESP Alchemist beginning with 5.1.