z/OS Communications Server: SNA Customization
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Final register contents

z/OS Communications Server: SNA Customization
SC27-3666-00

The routine must leave the register status as follows:
Registers 0–14:
Restored to entry contents
Register 15:
Return Code:
X'00' (0)
Processing successfully completed.
X'01'–X'4F' (1–79)
Exit processing did not work; the VR selection exit remains active.
X'50'–X'7F' (80–127)
Reserved
Greater than X'7F' (127)
Invocation failed; VR selection exit deleted and inactive
X'F0'–X'FF' (240–255)
Reserved
Parent topic: Virtual route selection exit routine

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