Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/LearningDesignDTO.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/LearningDesignDTO.java,v
diff -u -r1.41 -r1.42
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/LearningDesignDTO.java	9 Apr 2014 08:57:46 -0000	1.41
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/dto/LearningDesignDTO.java	22 Jun 2015 03:05:28 -0000	1.42
@@ -696,7 +696,7 @@
      *                The firstActivityUIID to set.
      */
     public void setFirstActivityUIID(Integer firstActivityUIID) {
-	if (!firstActivityUIID.equals(WDDXTAGS.NUMERIC_NULL_VALUE_INTEGER))
+	if (firstActivityUIID != null && !firstActivityUIID.equals(WDDXTAGS.NUMERIC_NULL_VALUE_INTEGER))
 	    this.firstActivityUIID = firstActivityUIID;
     }
 
Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/service/ExportToolContentService.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/learningdesign/service/ExportToolContentService.java,v
diff -u -r1.123 -r1.124
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/service/ExportToolContentService.java	16 Jan 2015 15:23:10 -0000	1.123
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/service/ExportToolContentService.java	22 Jun 2015 03:05:28 -0000	1.124
@@ -1312,8 +1312,8 @@
 		badFileType(ldErrorMsgs, filename, "Unexpected extension");
 	    }
 
-	} catch (Exception e) {
-	    throw new ImportToolContentException(e);
+	}  catch (Exception e) {
+	    throw new ImportToolContentException("Error while importing a sequence", e);
 	}
 
 	ldResults[0] = ldId;