One app server still shows old kernel version after kernel upgrade

Hello All,

WE have upgraded kernel version from 753_REL - 215 to 753_REL 400 in 7 app servers of our ECC production system.

However after kernel upgrade, the disp+work in app 4 shows the latest while release notes in SAP - SM51 shows old (215)version.

The other servers are fine. This problem is only with app 4. Please help!

Thanks,

Uday