A fix is available
APAR status
Closed as program error.
Error description
After upgrading zoautil to 1.4.1 and installing the updated .whl package in a venv the following error is seen for datasets.create: IndexError: list index out of range During handling of the above exception, another exception occurred: raise DatasetVerificationError(name) zoautil_py.exceptions.DatasetVerificationError: xxxxxx.TEMP.TEST.DSN Same script when executed on a system with zoautil 1.4.0 works normally. ZOAU 1.4.1.1
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: Users of IBM Z Open Automation Utilities * * (ZOAU) version 1.4.1.0 * **************************************************************** * PROBLEM DESCRIPTION: The ZOAU dls utility fails with JSON * * serialization error (BGYSC5308E) when * * listing multi-volumed datasets with * * many candidate volumes. This occurs * * because the JSON buffer size * * calculation only counted datasets * * instead of volumes, causing buffer * * overflow when a dataset spans more * * than 22 volumes. * * * * As a result, the Python * * datasets.create() API in zoautil_py * * fails with a DatasetVerificationError. * **************************************************************** * RECOMMENDATION: APPLY APAR/PTF. This is an important fix for * * users working with multi-volume datasets. * * * * This is a maintenance release with a single * * bug fix. It is a full replacement for * * ZOAU 1.4.1.0. * **************************************************************** The ZOAU dls utility fails with JSON serialization error (BGYSC5308E) when listing multi-volumed datasets with many candidate volumes. This occurs because the JSON buffer size calculation only counted datasets instead of volumes, causing buffer overflow when a dataset spans more than 22 volumes. As a result, the Python datasets.create() API in zoautil_py fails with a DatasetVerificationError.
Problem conclusion
***
Temporary fix
Comments
APAR Information
APAR number
PH71148
Reported component name
Z OPEN AUTO UTL
Reported component ID
5724T0753
Reported release
140
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2026-05-01
Closed date
2026-05-12
Last modified date
2026-05-14
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UO07782
Modules/Macros
BGY312W4 BGY313W4 BGY314W4 BGYBIN4 BGYCONF4 BGYDOCS4 BGYINCL4 BGYLIB4 BGYLICS4 BGYPTGZ4 BGYRDME4 BGYSAMP4 BGYSTUB4 BGYZOAU4
Fix information
Fixed component name
Z OPEN AUTO UTL
Fixed component ID
5724T0753
Applicable component levels
R140 PSY UO07782
UP26/05/14 I 1000
Fix is available
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Document Information
Modified date:
14 May 2026