diff --git a/p/C0XF2N.m b/p/C0XF2N.m
index 6d3e0e3..df8b009 100644
--- a/p/C0XF2N.m
+++ b/p/C0XF2N.m
@@ -403,6 +403,8 @@ ADD(ZG,ZS,ZP,ZO,FARY) ; ADD A TRIPLE TO THE TRIPLESTORE. ALL VALUES ARE TEXT
  N ZNODE
  S ZNODE="N"_$$LKY17
  N ZNARY ; GET READY TO CALL IENOFA
+ I (ZG="")!(ZS="")!(ZP="")!(ZO="") D  Q  ;
+ . I $G(DEBUG) W !,"Error Empty String ZG:"_ZG_" ZS:"_ZS_" ZP:"_ZP_" ZO"_ZO
  S ZNARY("ZG",ZG)=""
  S ZNARY("ZS",ZS)=""
  S ZNARY("ZP",ZP)=""