Run YAPYMDLCHG on model get error Y2E0028

Document ID : KB000076603
Last Modified Date : 06/04/2018
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Issue:
When run YAPYMDLCHG on model <model_name> get error
Y2E0028 Escape 40 04/05/18 12:19:09.967751 YCHGMDLH@C Y2SY *STMT QCMD QSYS 01C8 
From module . . . . . . . . : YCHGMDLH@C 
From procedure . . . . . . : YCHGMDLH@C 
Statement . . . . . . . . . : xxxxx
Message . . . . : Previous conversion of Model XXXX not completed 
CAUSE: A previous execution of YAPYMDLCHG for model XXXX failed to complete, 
so model contains work files whose names begin with 'Z'. RECOVERY: (1) 
Determine cause of failure and correct error. Consult customer support if 
uncertain. (2) Restore model from a backup and re-run YAPYMDLCHG command.
Resolution:
The Y2E0028 on a model, when converting models using YAPYMDLCHG is typically caused by Z* files in the model library.  Normally there will be just one single Z file 'ZJOBLSTRFP' in the model library.  You will need to delete ALL the Z files from the model library (see the model reference from the joblog), then rerun the YAPYMDLCHG command to resolve the error and convert your model.