This patch corrects a bug where the last volume of a migration 
  job is incorrectly found producing an error.  This fixes bug #936.
  Apply the patch to 2.2.3 (and possibly earlier 2.2.x versions) with:

  cd <bacula-source>
  patch -p0 <2.2.3-migrate-vol.patch
  ./configure (your options)
  make
  ...
  make install

Index: src/dird/migrate.c
===================================================================
--- src/dird/migrate.c	(revision 5507)
+++ src/dird/migrate.c	(working copy)
@@ -1098,8 +1098,10 @@
       if (mig_jcr->VolumeName[0]) {
          /* Find last volume name. Multiple vols are separated by | */
          char *p = strrchr(mig_jcr->VolumeName, '|');
-         if (!p) {
-            p = mig_jcr->VolumeName;
+         if (p) {
+            p++;                         /* skip | */
+         } else {
+            p = mig_jcr->VolumeName;     /* no |, take full name */
          }
          bstrncpy(mr.VolumeName, p, sizeof(mr.VolumeName));
          if (!db_get_media_record(jcr, jcr->db, &mr)) {