diff --git a/frontends/src/jp/constants.py b/frontends/src/jp/constants.py
index 13568860..9be1d2e6 100644
--- a/frontends/src/jp/constants.py
+++ b/frontends/src/jp/constants.py
@@ -46,6 +46,7 @@ class Const(constants.Const):
     EXIT_BRIDGE_ERROR = 3 # can't connect to bridge
     EXIT_BRIDGE_ERRBACK = 4 # something went wrong when calling a bridge method
     EXIT_NOT_FOUND = 16 # an item required by a command was not found
+    EXIT_DATA_ERROR = 17 # data needed for a command is invalid
     EXIT_FILE_NOT_EXE = 126 # a file to be executed was found, but it was not an executable utility (cf. man 1 exit)
     EXIT_CMD_NOT_FOUND = 127 # a utility to be executed was not found (cf. man 1 exit)
     EXIT_SIGNAL_INT = 128 # a command was interrupted by a signal (cf. man 1 exit)