Hello sharfuddin,

The "Exec format error" leads me to think this problem is related to a cross-architecture upgrade. I will explain.

SLES11 for IBM Power is big endian whereas SLES12 and newer SLES versions for IBM Power are little endian. In-place upgrades from SLES11 on IBM Power to SLES12 on IBM Power are not supported. Please read the "Important: Cross-architecture Upgrades Are Not Supported" section in https://www.suse.com/documentation/s...date.sle.paths.

Consider opening a support request with SUSE for more information.