Sergio, Our mainframe network guy suggests that some messages on the z/OS log before what you included might have indicated the beginning of the problem. Without knowing that your ZOS17 guest only had 500M, he suggested that it might be running short on storage, and that JES was already complaining about storage.
Try changing this: USER ZOS17 ZOS17 500M 1000M ABCDEFG to: USER ZOS17 ZOS17 2G 4G G z/OS is very storage hungry, stealing a "page" (forgive the pun) from the old potato chip commercials is the U.S.: "Eat all you want, we'll make more". Once the problem is solved you can always go back to adjust the ZOS17 guest virtual storage size if the problem is eliminated. By the way, you should change the ZOS17 userid password (the second "ZOS17") to something else - hackers ALWAYS try the userid as the password one of their first guesses. Besides, you already showed the password to the whole world in your post). We also noted that you only have CTCs for z/OS to use for networking. Was that intentional, or are you maybe missing one or more (usually three) DEDICATE statements for OSA's? Mike Walter Hewitt Associates Any opinions expressed herein are mine alone and do not necessarily represent the opinions or policies of Hewitt Associates. The information contained in this e-mail and any accompanying documents may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message, including any attachments. Any dissemination, distribution or other use of the contents of this message by anyone other than the intended recipient is strictly prohibited. All messages sent to and from this e-mail address may be monitored as permitted by applicable law and regulations to ensure compliance with our internal policies and to protect our business. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by e-mail.