FS-4480 try this

diff --git a/src/mod/applications/mod_dptools/mod_dptools.c b/src/mod/applications/mod_dptools/mod_dptools.c
index 4b46e7eec35c3952d52c41f14d2a708519859812..5ca719e8d2e31764040dd2a9acbfe64b3f2b780c 100755 (executable)
--- a/src/mod/applications/mod_dptools/mod_dptools.c
+++ b/src/mod/applications/mod_dptools/mod_dptools.c
@@ -1403,7 +1403,7 @@ SWITCH_STANDARD_APP(export_function)
                        }
                }
 
-               switch_channel_export_variable(channel, var, val, SWITCH_EXPORT_VARS_VARIABLE);
+               switch_channel_export_variable_var_check(channel, var, val, SWITCH_EXPORT_VARS_VARIABLE, SWITCH_FALSE);
        }
 }