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JES000011E Batch Spool File Error; SPLJOB Status Open I/O

  • February 10, 2026
  • 1 reply
  • 17 views

sergi.yague
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On a Rocket Enterprise Server 11 installed on a Windows 11 system, I created a test region (using the JCL template) and associated a project with it. I started the region and received the following error:
JES000011E Batch Spool File Error; SPLJOB Status Open I/O
CASSI9012E JCL support failed to start. Error returned from casspool, RC=0012
Does anyone know where I should define the spool file path?

1 reply

Kim Hoskin
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  • Moderator
  • February 10, 2026

Hi Sergi,
What does your region’s JES > Configuration have set?
E.g JES Program Path, System Catalog, Default Allocated Dataset Location , are these values set?