The steps below are taken from the SAP Note 1901463 – How to unlock the SAP system to perform correction(s) during an upgrade.
To unlock the SAP system, enter the following commands. The system may be either the original SAP system or the shadow system, depending on which one the error occurred.
Original SAP system
cd /[update directory]/abap/bin
./SAPup unlocksys
Shadow system
cd /[update directory]/abap/bin
SAPup unlockshd
Log on to the SAP system or shadow system and correct the error.
To lock the original SAP system or shadow system again, enter the following commands:
Original SAP system
cd /[update directory]/abap/bin
./SAPup locksys
Shadow system
cd /[update directory]/abap/bin
SAPup lockshd
