Description
This program allows you to set a lock in the system which prevents usersfrom logging on to the SAP system. As long as the system is locked inthis way, the only two users able to log on are SAP* and DDIC.
You lock the SAP system by specifying a T100 application area and a T100message number.
If a user now tries to log on to the system, he or she is unable to andsees instead the specified T100 message in the status bar.
Note
Bear in mind that the message long texts cannot be read since thisrequires a user to log on successfully.
This mechanism allows any messages to be sent, particularly messages youhave defined yourself, when logging on is to be prevented temporarily.
If the parameter "Unlock" contains the value "X", the lock is removed.
Note
This mechanism is also used by tp (transport control) to prevent usersfrom logging on during an import or upgrade.
A system that has been locked by tp cannot be unlocked with RDDITLCK.

Precondition
You require authorization S_CTS_ADMIN (administrator for the WorkbenchOrganizer and transport system) to be able to lock/unlock the system.The value 'SYSC' is checked for the authorization object S_CTS_ADMI.

Output
The program reports whether locking or unlocking has been successful orhas failed.

Example
Lock:
Call with unlock = " ", T100 application area = "TW", T100 messagenumber = "900" allows each user to see the T100 message TW900 whenlogging on.
Unlock:
Call with unlock = "X" removes this lock.