diff --git a/ext/session/changeset.c b/ext/session/changeset.c
index 1ff5cde87d..edb43ff8e5 100644
--- a/ext/session/changeset.c
+++ b/ext/session/changeset.c
@@ -232,8 +232,10 @@ int main(int argc, char **argv){
       exit(1);
     }
     readFile(argv[3], &szB, &pB);
-    sqlite3changeset_concat(sz, pBuf, szB, pB, &szOut, &pOutBuf);
-    if( fwrite(pOutBuf, szOut, 1, out)!=1 ){
+    rc = sqlite3changeset_concat(sz, pBuf, szB, pB, &szOut, &pOutBuf);
+    if( rc!=SQLITE_OK ){
+      fprintf(stderr, "sqlite3changeset_concat() returns %d\n", rc);
+    }else if( szOut>0 && fwrite(pOutBuf, szOut, 1, out)!=1 ){
       fprintf(stderr, "unable to write all %d bytes of output to \"%s\"\n",
               szOut, zOut);
     }
@@ -300,8 +302,10 @@ int main(int argc, char **argv){
       fprintf(stderr, "cannot open \"%s\" for writing\n", zOut);
       exit(1);
     }
-    sqlite3changeset_invert(sz, pBuf, &szOut, &pOutBuf);
-    if( fwrite(pOutBuf, szOut, 1, out)!=1 ){
+    rc = sqlite3changeset_invert(sz, pBuf, &szOut, &pOutBuf);
+    if( rc!=SQLITE_OK ){
+      fprintf(stderr, "sqlite3changeset_invert() returns %d\n", rc);
+    }else if( szOut>0 && fwrite(pOutBuf, szOut, 1, out)!=1 ){
       fprintf(stderr, "unable to write all %d bytes of output to \"%s\"\n",
               szOut, zOut);
     }
diff --git a/manifest b/manifest
index d2986aafb7..8526781f17 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sthe\sautoconf\sand\sMSVC\smakefiles\sso\sthat\sthey\sconstruct\sthe\schangeset\ncommand-line\sutility\supon\srequest.\s\sDelete\sthat\sutility\sprogram\swhen\n"make\sclean"\sis\srun.
-D 2014-08-18T20:23:29.435
+C Improved\sresponse\sto\serror\sconditions\sin\sthe\s".session"\sshell\scommand\sand\nin\sthe\s"changeset"\scommand-line\sprogram.
+D 2014-08-19T00:26:17.830
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in d5ad373b7a23525414b8843b3084cf90c560d92f
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -143,7 +143,7 @@ F ext/rtree/rtree_util.tcl 06aab2ed5b826545bf215fff90ecb9255a8647ea
 F ext/rtree/sqlite3rtree.h 83349d519fe5f518b3ea025d18dd1fe51b1684bd
 F ext/rtree/tkt3363.test 142ab96eded44a3615ec79fba98c7bde7d0f96de
 F ext/rtree/viewrtree.tcl eea6224b3553599ae665b239bd827e182b466024
-F ext/session/changeset.c 9be709cea346d65c6d0cc8bf03569956af125462
+F ext/session/changeset.c 4ccbaa4531944c24584bf6a61ba3a39c62b6267a
 F ext/session/session1.test 3733d71eb9a99b14d51fa5219d5b8a82407c3be8
 F ext/session/session2.test 99ca0da7ddb617d42bafd83adccf99f18ae0384b
 F ext/session/session3.test a7a9ce59b8d1e49e2cc23d81421ac485be0eea01
@@ -239,7 +239,7 @@ F src/random.c d10c1f85b6709ca97278428fd5db5bbb9c74eece
 F src/resolve.c 0ea356d32a5e884add23d1b9b4e8736681dd5697
 F src/rowset.c a9c9aae3234b44a6d7c6f5a3cadf90dce1e627be
 F src/select.c ea48e891406ccdf748f3eb02893e056d134a0fea
-F src/shell.c 1761e117dd58e2383a2d30319c49d0fca00f8bf0
+F src/shell.c 220564b70a2115e2157688f8faa6bb751ffe019a
 F src/sqlite.h.in 021a1f5c50e83060675d994a6014fd409e611d9e
 F src/sqlite3.rc 992c9f5fb8285ae285d6be28240a7e8d3a7f2bad
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
@@ -1203,7 +1203,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 1324d08d0c639378cf1b03bd6410db81947747ac
-R fdaf7ebc782210d979a62294e31e9051
+P 4dc15fe066f079ff31c89a5e0242dd5b3c851d29
+R d85ccd3884f4a5cc5341a67dd8277838
 U drh
-Z e19e0e50f2717082ee6e33a1c9b88ce5
+Z edfba13e974f0e2f2be5cef97fba91ac
diff --git a/manifest.uuid b/manifest.uuid
index 2e186914d2..fc1bfdae69 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-4dc15fe066f079ff31c89a5e0242dd5b3c851d29
\ No newline at end of file
+b69f7dd1f35846c3bb9f4f160d50c4f03796f887
\ No newline at end of file
diff --git a/src/shell.c b/src/shell.c
index d45e59166e..ac42909582 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -3232,9 +3232,13 @@ static int do_meta_command(char *zLine, ShellState *p){
         int szChng;
         void *pChng;
         if( azCmd[0][0]=='c' ){
-          sqlite3session_changeset(pSession->p, &szChng, &pChng);
+          rc = sqlite3session_changeset(pSession->p, &szChng, &pChng);
         }else{
-          sqlite3session_patchset(pSession->p, &szChng, &pChng);
+          rc = sqlite3session_patchset(pSession->p, &szChng, &pChng);
+        }
+        if( rc ){
+          printf("Error: error code %d\n", rc);
+          rc = 0;
         }
         if( pChng 
           && fwrite(pChng, szChng, 1, out)!=1 ){