error msg when commandId not found for maker-checker approvals

mifosng-provider/src/main/java/org/mifosplatform/commands/exception/CommandNotFoundException.java

@@ -0,0 +1,18 @@
+/**
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+package org.mifosplatform.commands.exception;
+
+import org.mifosplatform.infrastructure.core.exception.AbstractPlatformResourceNotFoundException;
+
+/**
+ * A {@link RuntimeException} thrown when client resources are not found.
+ */
+public class CommandNotFoundException extends AbstractPlatformResourceNotFoundException {
+
+	public CommandNotFoundException(Long id) {
+		super("error.msg.command.id.invalid", "Command with identifier " + id + " does not exist", id);
+	}
+}

mifosng-provider/src/main/java/org/mifosplatform/commands/service/PortfolioCommandSourceWritePlatformServiceImpl.java

@@ -14,6 +14,7 @@ import org.mifosplatform.infrastructure.core.api.JsonCommand;
 import org.mifosplatform.infrastructure.core.data.CommandProcessingResult;
 import org.mifosplatform.infrastructure.core.serialization.FromJsonHelper;
 import org.mifosplatform.infrastructure.security.service.PlatformSecurityContext;
+import org.mifosplatform.portfolio.client.exception.ClientNotFoundException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -86,7 +87,8 @@ public class PortfolioCommandSourceWritePlatformServiceImpl implements Portfolio
     public CommandProcessingResult approveEntry(final Long commandId) {
 
         final CommandSource commandSourceInput = this.commandSourceRepository.findOne(commandId);
-
+        if (commandSourceInput == null) {throw new ClientNotFoundException(commandId);}
+        
         context.authenticatedUser().validateHasCheckerPermissionTo(commandSourceInput.getPermissionCode());
 
         final CommandWrapper wrapper = CommandWrapper.fromExistingCommand(commandId, commandSourceInput.getActionName(),