diff --git a/src/main/java/de/thm/arsnova/FeedbackStorage.java b/src/main/java/de/thm/arsnova/FeedbackStorage.java
index bb72be0d5e6bc89122922919464c18aff19ef98f..ee9abd74deb271ab80623730e454fed289efda85 100644
--- a/src/main/java/de/thm/arsnova/FeedbackStorage.java
+++ b/src/main/java/de/thm/arsnova/FeedbackStorage.java
@@ -118,7 +118,7 @@ public class FeedbackStorage {
 	public Map<Session, List<User>> cleanFeedbackVotes(final int cleanupFeedbackDelay) {
 		final Map<Session, List<User>> removedFeedbackOfUsersInSession = new HashMap<>();
 		for (final Session session : data.keySet()) {
-			if (!session.getFeatures().isLiveClicker()) {
+			if (session.getFeatures() == null || !session.getFeatures().isLiveClicker()) {
 				List<User> affectedUsers = cleanFeedbackVotesInSession(session, cleanupFeedbackDelay);
 				if (!affectedUsers.isEmpty()) {
 					removedFeedbackOfUsersInSession.put(session, affectedUsers);
diff --git a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
index d0f5656a66034d974401adb34d1268ef3cf26d83..f4044fd9552e38507894660173e2d5bff02bf7f3 100644
--- a/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
+++ b/src/main/java/de/thm/arsnova/dao/CouchDBDao.java
@@ -2447,17 +2447,19 @@ public class CouchDBDao implements IDatabaseDao, ApplicationEventPublisherAware
 				q.put("creator", "");
 				interposedQuestions.add(q);
 			}
-			for (Motd m : importSession.getMotds()) {
-				final Document d = new Document();
-				d.put("type", "motd");
-				d.put("motdkey", m.getMotdkey());
-				d.put("title", m.getTitle());
-				d.put("text", m.getText());
-				d.put("audience", m.getAudience());
-				d.put("sessionkey", session.getKeyword());
-				d.put("startdate", String.valueOf(m.getStartdate().getTime()));
-				d.put("enddate", String.valueOf(m.getEnddate().getTime()));
-				motds.add(d);
+			if (importSession.getMotds() != null) {
+				for (Motd m : importSession.getMotds()) {
+					final Document d = new Document();
+					d.put("type", "motd");
+					d.put("motdkey", m.getMotdkey());
+					d.put("title", m.getTitle());
+					d.put("text", m.getText());
+					d.put("audience", m.getAudience());
+					d.put("sessionkey", session.getKeyword());
+					d.put("startdate", String.valueOf(m.getStartdate().getTime()));
+					d.put("enddate", String.valueOf(m.getEnddate().getTime()));
+					motds.add(d);
+				}
 			}
 			List<Document> documents = new ArrayList<>(answers);
 			database.bulkSaveDocuments(interposedQuestions.toArray(new Document[interposedQuestions.size()]));
diff --git a/src/main/java/de/thm/arsnova/entities/transport/ImportExportSession.java b/src/main/java/de/thm/arsnova/entities/transport/ImportExportSession.java
index 02a01e975c8818aa1cbdac2b65a06c85ac535c55..7cbfce0522bc2ff5e3d2418673f80fb808ef69b2 100644
--- a/src/main/java/de/thm/arsnova/entities/transport/ImportExportSession.java
+++ b/src/main/java/de/thm/arsnova/entities/transport/ImportExportSession.java
@@ -129,21 +129,23 @@ public class ImportExportSession {
 		// import fields
 		s.setActive(session.isActive());
 		// overwrite name and shortname
-		s.setName(session.getPublicPool().getName());
-		s.setShortName(session.getPublicPool().getShortName());
+		s.setName(session.getName());
+		s.setShortName(session.getShortName());
 		// mark as public pool session
 		s.setSessionType(session.getSessionType());
 		s.setFeatures(session.getSessionFeature());
-		// set pool fields (which are also used as a session info)
-		s.setPpAuthorMail(session.getPublicPool().getPpAuthorMail());
-		s.setPpAuthorName(session.getPublicPool().getPpAuthorName());
-		s.setPpDescription(session.getPublicPool().getPpDescription());
-		s.setPpFaculty(session.getPublicPool().getPpFaculty());
-		s.setPpLevel(session.getPublicPool().getPpLevel());
-		s.setPpLicense(session.getPublicPool().getPpLicense());
-		s.setPpLogo(session.getPublicPool().getPpLogo());
-		s.setPpSubject(session.getPublicPool().getPpSubject());
-		s.setPpUniversity(session.getPublicPool().getPpUniversity());
+		if (session.getPublicPool() != null) {
+			// set pool fields (which are also used as a session info)
+			s.setPpAuthorMail(session.getPublicPool().getPpAuthorMail());
+			s.setPpAuthorName(session.getPublicPool().getPpAuthorName());
+			s.setPpDescription(session.getPublicPool().getPpDescription());
+			s.setPpFaculty(session.getPublicPool().getPpFaculty());
+			s.setPpLevel(session.getPublicPool().getPpLevel());
+			s.setPpLicense(session.getPublicPool().getPpLicense());
+			s.setPpLogo(session.getPublicPool().getPpLogo());
+			s.setPpSubject(session.getPublicPool().getPpSubject());
+			s.setPpUniversity(session.getPublicPool().getPpUniversity());
+		}
 		// other fields
 		s.setType("session");
 		s.setCreator(user.getUsername());