diff --git a/convex-core/src/main/cvx/asset/share.cvx b/convex-core/src/main/cvx/asset/share.cvx
index e7c5b26a7..8aee42447 100644
--- a/convex-core/src/main/cvx/asset/share.cvx
+++ b/convex-core/src/main/cvx/asset/share.cvx
@@ -145,8 +145,8 @@
       rec (get hs id)]
     (if rec
       (let [os (nth rec 1) ;; offers map
-            off (or (get os receiver) (fail "No offer to receiver"))
-            _ (cond (< off quantity) (fail "insufficient offer"))
+            off (or (get os receiver) (fail :STATE "No offer to receiver"))
+            _ (cond (< off quantity) (fail :STATE "insufficient offer"))
             bal (nth rec 0)
             nbal (- bal quantity)
             _ (cond (< nbal 0) (fail "insufficent balance to accept"))
diff --git a/convex-core/src/main/cvx/convex/fungible.cvx b/convex-core/src/main/cvx/convex/fungible.cvx
index b6bf0e637..b2c00cb3f 100644
--- a/convex-core/src/main/cvx/convex/fungible.cvx
+++ b/convex-core/src/main/cvx/convex/fungible.cvx
@@ -127,7 +127,7 @@
 
                (< offer
                   quantity)
-               (fail "Offer is insufficient")
+               (fail :STATE "Offer is insufficient")
 
                (< sendbal
                   quantity)
diff --git a/convex-core/src/test/java/convex/lib/AssetTester.java b/convex-core/src/test/java/convex/lib/AssetTester.java
index e66cdaa9c..e21c358cb 100644
--- a/convex-core/src/test/java/convex/lib/AssetTester.java
+++ b/convex-core/src/test/java/convex/lib/AssetTester.java
@@ -88,15 +88,17 @@ public static void doFungibleTests (Context ctx, ACell token, Address user) {
 			assertCVMEquals(BAL,evalL(ctxx,"(asset/balance token)"));
 			
 			// accepting one more token at this point should be error
-			assertError(step(ctxx,"(asset/accept *address* [token 1])"));
+			assertStateError(step(ctxx,"(asset/accept *address* [token 1])"));
 
-			ctxx = step (ctxx,"(asset/offer *address* token BAL)");
-			assertCVMEquals(BAL,ctxx.getResult());
+			// Offer / accept of half balance should work
+			ctxx = step (ctxx,"(asset/offer *address* token (div BAL 2))");
+			assertCVMEquals(BAL/2,ctxx.getResult());
+			assertStateError(step(ctxx,"(asset/accept *address* [token (inc (div BAL 2))])"));
 			ctxx=step(ctxx,"(asset/accept *address* token (div BAL 2))");
 			assertCVMEquals(BAL/2,ctxx.getResult());
 			assertCVMEquals(BAL,evalL(ctxx,"(asset/balance token)"));
 
-			
+			// Set back to zero offer
 			ctxx = step(ctxx,"(asset/offer *address* [token 0])");
 			assertCVMEquals(0L,ctxx.getResult());
 			assertEquals(0L,evalL(ctxx,"(asset/get-offer token *address* *address*)"));