You can only read data from one system at a time. This means that before you can log into a system for the sake of reading data from it, you must log off from the system you were previously logged onto.

This means that before switching systems in the following situations, you must first log off from the current system:

• To switch from one system to another in online mode
• To switch from one system to another in offline mode
• To switch from being connected offline to being connected to an R/3 system in online mode

You do not need to log off from the current system in the following situations:

• Connecting offline (logging onto a local repository) while being connected online for the purpose of saving data into the local repository. As the matter of fact, connecting first to an online system and then opening the target local repository is the correct procedure for saving data into a local repository. The reason you do not have to log off the local repository in this case is because you are not reading data from the local repository, you are only writing into it.

• You also do not need to log off from a system you are using when exiting SAP Assistant. SAP Assistant logs you off automatically when you exit.