diff --git a/org.adempiere.base.process/src/org/compiere/process/ColumnSync.java b/org.adempiere.base.process/src/org/compiere/process/ColumnSync.java
index a44119b38e..040ad59e62 100644
--- a/org.adempiere.base.process/src/org/compiere/process/ColumnSync.java
+++ b/org.adempiere.base.process/src/org/compiere/process/ColumnSync.java
@@ -20,6 +20,7 @@ import java.math.BigDecimal;
 import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.ResultSet;
+import java.sql.Types;
 import java.util.logging.Level;
 
 import org.compiere.model.MColumn;
@@ -110,6 +111,21 @@ public class ColumnSync extends SvrProcess
 				//	update existing column
 				boolean notNull = DatabaseMetaData.columnNoNulls == rs.getInt("NULLABLE");
 				sql = column.getSQLModify(table, column.isMandatory() != notNull);
+				if (DB.isOracle()) {
+					// IDEMPIERE-3842 problem with oracle alter CLOB or BLOB
+					int actualType = rs.getInt("DATA_TYPE");
+					if (actualType == Types.CLOB) {
+						if (sql.contains(" MODIFY " + column.getColumnName() + " CLOB")) {
+							// trying to make CLOB a column that is already a CLOB
+							sql = sql.replaceFirst(" MODIFY " + column.getColumnName() + " CLOB", " MODIFY " + column.getColumnName());
+						}
+					} else if (actualType == Types.BLOB) {
+						if (sql.contains(" MODIFY " + column.getColumnName() + " BLOB")) {
+							// trying to make BLOB a column that is already a BLOB
+							sql = sql.replaceFirst(" MODIFY " + column.getColumnName() + " BLOB", " MODIFY " + column.getColumnName());
+						}
+					}
+				}
 				break;
 			}
 			DB.close(rs);
diff --git a/org.adempiere.base/src/org/compiere/model/MColumn.java b/org.adempiere.base/src/org/compiere/model/MColumn.java
index 93dd0e0a67..f7a302758b 100644
--- a/org.adempiere.base/src/org/compiere/model/MColumn.java
+++ b/org.adempiere.base/src/org/compiere/model/MColumn.java
@@ -763,7 +763,7 @@ public class MColumn extends X_AD_Column
 			foreignTable = "M_AttributeSetInstance";
 		} else if (DisplayType.Assignment == refid) {
 			foreignTable = "S_ResourceAssignment";
-		} else if (DisplayType.Image == refid) {
+		} else if (DisplayType.Image == refid && !"BinaryData".equals(getColumnName())) {
 			foreignTable = "AD_Image";
 		} else if (DisplayType.Chart == refid) {
 			foreignTable = "AD_Chart";
diff --git a/org.adempiere.pipo.handlers/src/org/adempiere/pipo2/handler/ColumnElementHandler.java b/org.adempiere.pipo.handlers/src/org/adempiere/pipo2/handler/ColumnElementHandler.java
index 763e77c17b..9c4f70f105 100644
--- a/org.adempiere.pipo.handlers/src/org/adempiere/pipo2/handler/ColumnElementHandler.java
+++ b/org.adempiere.pipo.handlers/src/org/adempiere/pipo2/handler/ColumnElementHandler.java
@@ -20,6 +20,7 @@ import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.sql.Types;
 import java.util.List;
 import java.util.logging.Level;
 
@@ -245,10 +246,23 @@ public class ColumnElementHandler extends AbstractElementHandler {
 				if (rsc.next()) {
 					if (doAlter) {
 						// update existing column
-						boolean notNull = DatabaseMetaData.columnNoNulls == rsc
-								.getInt("NULLABLE");
-						sql = column.getSQLModify(table,
-								column.isMandatory() != notNull);
+						boolean notNull = DatabaseMetaData.columnNoNulls == rsc.getInt("NULLABLE");
+						sql = column.getSQLModify(table, column.isMandatory() != notNull);
+						if (DB.isOracle()) {
+							// IDEMPIERE-3842 problem with oracle alter CLOB or BLOB
+							int actualType = rsc.getInt("DATA_TYPE");
+							if (actualType == Types.CLOB) {
+								if (sql.contains(" MODIFY " + column.getColumnName() + " CLOB")) {
+									// trying to make CLOB a column that is already a CLOB
+									sql = sql.replaceFirst(" MODIFY " + column.getColumnName() + " CLOB", " MODIFY " + column.getColumnName());
+								}
+							} else if (actualType == Types.BLOB) {
+								if (sql.contains(" MODIFY " + column.getColumnName() + " BLOB")) {
+									// trying to make BLOB a column that is already a BLOB
+									sql = sql.replaceFirst(" MODIFY " + column.getColumnName() + " BLOB", " MODIFY " + column.getColumnName());
+								}
+							}
+						}
 					}
 				} else {
 					// No existing column
diff --git a/org.compiere.db.oracle.provider/src/org/compiere/db/DB_Oracle.java b/org.compiere.db.oracle.provider/src/org/compiere/db/DB_Oracle.java
index 2cdf30439a..df59d4f924 100644
--- a/org.compiere.db.oracle.provider/src/org/compiere/db/DB_Oracle.java
+++ b/org.compiere.db.oracle.provider/src/org/compiere/db/DB_Oracle.java
@@ -369,6 +369,9 @@ public class DB_Oracle implements AdempiereDatabase
     public String convertStatement (String oraStatement)
     {
     	Convert.logMigrationScript(oraStatement, null);
+		if ("true".equals(System.getProperty("org.idempiere.db.oracle.debug"))) {
+			log.warning("Oracle -> " + oraStatement);
+		}
         return oraStatement;
     }   //  convertStatement
 
diff --git a/org.compiere.db.oracle.provider/src/org/compiere/dbPort/Convert_Oracle.java b/org.compiere.db.oracle.provider/src/org/compiere/dbPort/Convert_Oracle.java
index 25ddc18bd4..18389ad410 100644
--- a/org.compiere.db.oracle.provider/src/org/compiere/dbPort/Convert_Oracle.java
+++ b/org.compiere.db.oracle.provider/src/org/compiere/dbPort/Convert_Oracle.java
@@ -2,14 +2,22 @@ package org.compiere.dbPort;
 
 import java.util.ArrayList;
 
+import org.compiere.util.CLogger;
+
 public class Convert_Oracle extends Convert {
 
+	/** Logger */
+	private static CLogger log = CLogger.getCLogger(Convert_Oracle.class);
+
 	public Convert_Oracle() {}
 	
 	@Override
 	protected ArrayList<String> convertStatement(String sqlStatement) {
 		ArrayList<String> result = new ArrayList<String>();
 		result.add(sqlStatement);
+		if ("true".equals(System.getProperty("org.idempiere.db.oracle.debug"))) {
+			log.warning("Oracle -> " + sqlStatement);
+		}
 		return result;
 	}