diff --git a/ext/rbu/rbufault3.test b/ext/rbu/rbufault3.test
new file mode 100644
index 0000000000..e72eb14f7d
--- /dev/null
+++ b/ext/rbu/rbufault3.test
@@ -0,0 +1,98 @@
+# 2016 April 20
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# This file contains fault injection tests for RBU vacuum operations.
+#
+
+source [file join [file dirname [info script]] rbu_common.tcl]
+source $testdir/malloc_common.tcl
+set ::testprefix rbufault3
+
+foreach {fault errlist} {
+  oom-* {
+    {1 SQLITE_NOMEM}
+    {1 SQLITE_IOERR_NOMEM}
+    {1 {SQLITE_NOMEM - out of memory}}
+  }
+
+  ioerr-* {
+    {1 {SQLITE_IOERR - disk I/O error}}
+    {1 SQLITE_IOERR} 
+    {1 SQLITE_IOERR_WRITE} 
+    {1 SQLITE_IOERR_FSYNC} 
+    {1 SQLITE_IOERR_READ} 
+    {1 {SQLITE_IOERR - unable to open database: test.db2}} 
+    {1 {SQLITE_ERROR - unable to open database: test.db2}} 
+    {1 {SQLITE_ERROR - SQL logic error or missing database}}
+  }
+
+  cantopen* {
+    {1 {SQLITE_CANTOPEN - unable to open database: test.db2}}  
+    {1 {SQLITE_CANTOPEN - unable to open database: test.db2}}  
+    {1 {SQLITE_CANTOPEN - unable to open database file}}  
+    {1 SQLITE_CANTOPEN} 
+  }
+
+} {
+
+  reset_db
+  do_execsql_test 0 {
+    CREATE TABLE target(x UNIQUE, y, z, PRIMARY KEY(y));
+    INSERT INTO target VALUES(1, 2, 3);
+    INSERT INTO target VALUES(4, 5, 6);
+    INSERT INTO target VALUES(7, 8, 9);
+    CREATE INDEX i1 ON target(z);
+  }
+  faultsim_save_and_close
+
+  do_faultsim_test 1 -faults $fault -prep {
+    faultsim_restore_and_reopen
+    forcedelete test.db2
+  } -body {
+    sqlite3rbu_vacuum rbu test.db test.db2
+    while {[rbu step]=="SQLITE_OK"} {}
+    rbu close
+  } -test {
+    eval [list faultsim_test_result {0 SQLITE_DONE} {*}$::errlist]
+  }
+
+  do_faultsim_test 2 -faults $fault -prep {
+    faultsim_restore_and_reopen
+    forcedelete test.db2
+  } -body {
+    sqlite3rbu_vacuum rbu test.db test.db2
+    rbu step
+    rbu close
+  } -test {
+    eval [list faultsim_test_result {0 SQLITE_OK} {*}$::errlist]
+  }
+
+  forcedelete test.db2
+  sqlite3rbu_vacuum rbu test.db test.db2
+  rbu step
+  rbu close
+  faultsim_save_and_close
+
+  do_faultsim_test 3 -faults $fault -prep {
+    faultsim_restore_and_reopen
+    forcedelete test.db2
+  } -body {
+    sqlite3rbu_vacuum rbu test.db test.db2
+    rbu step
+    rbu close
+  } -test {
+    eval [list faultsim_test_result {0 SQLITE_OK} {*}$::errlist]
+  }
+
+}
+
+finish_test
+
diff --git a/ext/rbu/sqlite3rbu.c b/ext/rbu/sqlite3rbu.c
index 8c7682abea..8a1b06dd62 100644
--- a/ext/rbu/sqlite3rbu.c
+++ b/ext/rbu/sqlite3rbu.c
@@ -2339,7 +2339,7 @@ static void rbuOpenDatabase(sqlite3rbu *p){
   /* Open the RBU database */
   p->dbRbu = rbuOpenDbhandle(p, p->zRbu, 1);
 
-  if( rbuIsVacuum(p) ){
+  if( p->rc==SQLITE_OK && rbuIsVacuum(p) ){
     sqlite3_file_control(p->dbRbu, "main", SQLITE_FCNTL_RBUCNT, (void*)p);
   }
 
@@ -2355,11 +2355,13 @@ static void rbuOpenDatabase(sqlite3rbu *p){
   /* If it has not already been created, create the rbu_state table */
   rbuMPrintfExec(p, p->dbRbu, RBU_CREATE_STATE, p->zStateDb);
 
-  if( rbuIsVacuum(p) ){
+  if( p->rc==SQLITE_OK && rbuIsVacuum(p) ){
     int bOpen = 0;
+    int rc;
     p->nRbu = 0;
     p->pRbuFd = 0;
-    sqlite3_file_control(p->dbRbu, "main", SQLITE_FCNTL_RBUCNT, (void*)p);
+    rc = sqlite3_file_control(p->dbRbu, "main", SQLITE_FCNTL_RBUCNT, (void*)p);
+    if( rc!=SQLITE_NOTFOUND ) p->rc = rc;
     if( p->eStage>=RBU_STAGE_MOVE ){
       bOpen = 1;
     }else{
@@ -3411,6 +3413,9 @@ static void rbuCreateTargetSchema(sqlite3rbu *p){
     sqlite3_step(pInsert);
     p->rc = sqlite3_reset(pInsert);
   }
+  if( p->rc==SQLITE_OK ){
+    p->rc = sqlite3_exec(p->dbMain, "PRAGMA writable_schema=0",0,0,&p->zErrmsg);
+  }
 
   rbuFinalize(p, pSql);
   rbuFinalize(p, pInsert);
@@ -3511,7 +3516,9 @@ static sqlite3rbu *openRbuHandle(
 
         /* Open transactions both databases. The *-oal file is opened or
         ** created at this point. */
-        p->rc = sqlite3_exec(db, "BEGIN IMMEDIATE", 0, 0, &p->zErrmsg);
+        if( p->rc==SQLITE_OK ){
+          p->rc = sqlite3_exec(db, "BEGIN IMMEDIATE", 0, 0, &p->zErrmsg);
+        }
         if( p->rc==SQLITE_OK ){
           p->rc = sqlite3_exec(p->dbRbu, "BEGIN", 0, 0, &p->zErrmsg);
         }
@@ -3528,7 +3535,7 @@ static sqlite3rbu *openRbuHandle(
 
         /* If this is an RBU vacuum operation and the state table was empty
         ** when this handle was opened, create the target database schema. */
-        if( pState->eStage==0 && rbuIsVacuum(p) ){
+        if( p->rc==SQLITE_OK && pState->eStage==0 && rbuIsVacuum(p) ){
           rbuCreateTargetSchema(p);
           rbuCopyPragma(p, "user_version");
           rbuCopyPragma(p, "application_id");
@@ -3895,7 +3902,7 @@ static int rbuVfsRead(
       if( pRbu && rbuIsVacuum(pRbu) 
           && rc==SQLITE_IOERR_SHORT_READ && iOfst==0
           && (p->openFlags & SQLITE_OPEN_MAIN_DB)
-          && pRbu->pRbuFd->base.pMethods
+          && pRbu->rc==SQLITE_OK
       ){
         sqlite3_file *pFd = (sqlite3_file*)pRbu->pRbuFd;
         rc = pFd->pMethods->xRead(pFd, zBuf, iAmt, iOfst);
diff --git a/manifest b/manifest
index d233334b3c..e640d710d0 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Updates\sto\sensure\sthe\svalues\sof\sPRAGMA\ssettings\slike\s"page_size",\s"auto_vacuum",\s"user_version"\sand\s"application_id"\sare\snot\slost\swhen\sa\sdatabase\sis\sRBU\svacuumed.
-D 2016-04-19T19:27:09.289
+C Add\sfault\sinjection\stests\sfor\srbu\svacuum.\sFix\ssome\sproblems\srevealed\sby\sthe\ssame.
+D 2016-04-20T17:47:52.967
 F Makefile.in eba680121821b8a60940a81454316f47a341487a
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 71b8b16cf9393f68e2e2035486ca104872558836
@@ -243,11 +243,12 @@ F ext/rbu/rbucrash.test 8d2ed5d4b05fef6c00c2a6b5f7ead71fa172a695
 F ext/rbu/rbudiff.test 2df0a8a7d998ecf81764c21eeda3cde5611c5091
 F ext/rbu/rbufault.test cc0be8d5d392d98b0c2d6a51be377ea989250a89
 F ext/rbu/rbufault2.test 9a7f19edd6ea35c4c9f807d8a3db0a03a5670c06
+F ext/rbu/rbufault3.test 54a399888ac4af44c68f9f58afbed23149428bca
 F ext/rbu/rbufts.test 828cd689da825f0a7b7c53ffc1f6f7fdb6fa5bda
 F ext/rbu/rbuprogress.test 2023a7df2c523e3df1cb532eff811cda385a789a
 F ext/rbu/rbusave.test 0f43b6686084f426ddd040b878426452fd2c2f48
 F ext/rbu/rbuvacuum.test ecd7ce1cd8528d6230b56f4840bbb7188cee6946
-F ext/rbu/sqlite3rbu.c a6c02a67834f9e6c2adb18a9191aa0ae65057cfb
+F ext/rbu/sqlite3rbu.c cc44505ef06053077f35b08c4ba11dc8bcf310dc
 F ext/rbu/sqlite3rbu.h 1342ab6121e715b8da59ec35c5b5c16060be7a6b
 F ext/rbu/test_rbu.c 430b8b9520c233505371d564d3561e0b554355f4
 F ext/rtree/README 6315c0d73ebf0ec40dedb5aa0e942bc8b54e3761
@@ -1483,7 +1484,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P ca021ba88106500f347ed65199a4832bc9eb5ef8
-R 8122ed3aabc11f4475527c60a5badfa5
+P 74ffea76b8c9ddd7699ce6ca77dce005bd7922ac
+R f86f4403b5c8adf842292353673eca81
 U dan
-Z 8cbed13b6f72dec5a4cc65417abbee63
+Z 6e60b344cf662b4bf49e9c442360b79f
diff --git a/manifest.uuid b/manifest.uuid
index 590abb9da7..ce2dab7023 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-74ffea76b8c9ddd7699ce6ca77dce005bd7922ac
\ No newline at end of file
+f042fdd1ea7febec7228e51efc2b0281805e196a
\ No newline at end of file