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-rw-r--r--lib/sasl/doc/src/systools.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/sasl/doc/src/systools.xml b/lib/sasl/doc/src/systools.xml
index 8c1c327d74..fa2fcbf534 100644
--- a/lib/sasl/doc/src/systools.xml
+++ b/lib/sasl/doc/src/systools.xml
@@ -111,6 +111,11 @@
low-level instruction to restart the emulator is appended to
the relup scripts. This ensures that a complete reboot of
the system is done when the system is upgraded or downgraded.</p>
+ <p>If an upgrade includes a change from an emulator earlier
+ than OTP R15 to OTP R15 or later, the warning
+ <c>pre_R15_emulator_upgrade</c> is issued. See <seealso
+ marker="doc/design_principles:appup_cookbook">Design
+ Principles</seealso> for more information about this.</p>
<p>By default, errors and warnings are printed to tty and
the function returns <c>ok</c> or <c>error</c>. If the option
<c>silent</c> is provided, the function instead returns