General purpose register contents

Table F-2 shows the contents of the general purpose registers at the time the user exit invokes.

**Table F-2: User exit register contents**
User Exit Register	Contents
1	A pointer to a list of parameter addresses: The first address points to the LE Command structure (see “LE_CMD structure”). The LE Command structure defines the transaction operations that you want to send to Replication Server. The second address points to the user exit communications area (see Table F-3).
13	Address of the caller’s save area.
14	Return address.
15	User exit entry point address. At exit, register 15 contains your user exit application’s return code. You can specify that your user exit return any value. If it returns any value other than 0, LTM for MVS issues return code 20 to Replication Extract and shuts down with appropriate messages.