Newbie needs guidance on BC4J

I'm struggling to get my head round something. I'll keep it simple??
I have a user table (userid, username)
I have a message table (messageid, userid, message)
I have created Entity Objects for the user and message tables.
I have created an association between the user.userid and message.userid. I have created a view object based on these 2 entity objects as follows
select username, message, userid, messageid from
message, user where user.userid = message.userid;
When testing this single view object using the tester in Jdeveloper the functionality I require is that when a user wants to create a new message they click new and insert a new message yet pick an existing user from the user table. However the BC4J framework creates a new instance of Message entity and a new instance of the User entity. I do want to create a new message but not a new user!!
Where am I going wrong? I've read through lots and lots of docs but do not seem to find something this simple. Any pointers would be great. Thanks.

Try it this way.
Create a new view and add to it first the message table and only then the user table (note that the user table is added as a read-only table).
This should do the trick.

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Hi.
iPhoto tutorial at http://www.apple.com/ilife/tutorials/iphoto/
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ccarbery wrote:
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import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
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import java.sql.Types;
import oracle.jbo.JboException;
import oracle.jbo.domain.Number;
import oracle.jbo.server.DBTransaction;
import oracle.jbo.server.ViewObjectImpl;
import oracle.jbo.server.ViewRowImpl;
import oracle.jbo.server.ViewRowSetImpl;
import oracle.jdbc.driver.OracleCallableStatement;
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BigDecimal maxRowsAllowed = null;
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totalRowsSelected = (BigDecimal)params[3];
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totalRowsSelected,
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* Overridden framework method.
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* We ignore the JDBC ResultSet passed by the framework (null anyway) and
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ViewRowImpl r = createNewRowForCollection(qc);
try {
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populateAttributeForRow(r,0, nullOrNewNumber(rs.getBigDecimal(1)));
populateAttributeForRow(r,1, nullOrNewNumber(rs.getBigDecimal(2)));
populateAttributeForRow(r,2, rs.getString(3));
populateAttributeForRow(r,3, rs.getString(4));
populateAttributeForRow(r,4, rs.getString(5));
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throw new JboException(s);
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* Overridden framework method.
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ResultSet rs = getResultSet(qc);
boolean nextOne = false;
try {
nextOne = rs.next();
* When were at the end of the result set, mark the query collection
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if (!nextOne) {
setFetchCompleteForCollection(qc, true);
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rs.close();
catch (SQLException s) {
throw new JboException(s);
return nextOne;
* Overridden framework method.
* The framework gives us a chance to clean up any resources related
* to the datasource when a query collection is done being used.
protected void releaseUserDataForCollection(Object qc, Object rs) {
* Ignore the ResultSet passed in since we've created our own.
* Fetch the ResultSet from the User-Data context instead
ResultSet userDataRS = getResultSet(qc);
if (userDataRS != null) {
try {
userDataRS.close();
catch (SQLException s) {
/* Ignore */
super.releaseUserDataForCollection(qc, rs);
* Return a JDBC ResultSet representing the REF CURSOR return
* value from our stored package function.
private ResultSet retrieveRefCursor(Object qc,
String serialNum,
BigDecimal serialColCd,
BigDecimal maxRows,
BigDecimal totalRows,
String messageCd ) {
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Register the first bind parameter as our return value of type CURSOR
st.registerOutParameter(1,OracleTypes.CURSOR);
* Set the value of the 2nd bind variable to pass id as argument
if (serialNum == null) st.setNull(2,Types.CHAR);
else st.setString(2,serialNum);
if (serialColCd == null) st.setNull(3,Types.NUMERIC);
else st.setBigDecimal(3,serialColCd);
if (maxRows == null) st.setNull(4,Types.NUMERIC);
else st.setBigDecimal(4,maxRows);
if (totalRows == null) st.setNull(5,Types.NUMERIC);
else st.setBigDecimal(5,totalRows);
if (messageCd == null) st.setNull(6,Types.CHAR);
else st.setString(6,messageCd);
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rs.setFetchSize(getFetchSize());
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throw new JboException(s);
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private static oracle.jbo.domain.Number nullOrNewNumber(BigDecimal b) {
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I was able to get the input parameter by putting the following in my struts actions class
vo.setWhereClauseParam(0,request.getParameter("row0_SerialNum"));
The full code is:
package mypackage2;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import oracle.jbo.html.BC4JContext;
import oracle.jbo.ViewObject;
import oracle.jbo.html.struts11.BC4JUtils;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class LienCheckView1QueryAction extends Action
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
BC4JContext context = BC4JContext.getContext(request);
// Retrieve the view object instance to work with by name
ViewObject vo = context.getApplicationModule().findViewObject("LienCheckView1");
vo.setRangeSize(3);
vo.setIterMode(ViewObject.ITER_MODE_LAST_PAGE_PARTIAL);
// Do any additional VO setup here (e.g. setting bind parameter values)
vo.setWhereClauseParam(0,request.getParameter("row0_SerialNum"));
// default value for serialCollCd 1 is for Motor Vehicles
vo.setWhereClauseParam(1,new oracle.jbo.domain.Number(1));
// Default value for maxRows_allowed
vo.setWhereClauseParam(2,new oracle.jbo.domain.Number(20));
return BC4JUtils.getForwardFromContext(context, mapping);
This doesn't always work properly though. The first time I press the query button, the SerialNum parameter is still null, however if I re-execute the query by pressing the query button again. It will work, and return the rows. I always have to query twice. Also the SerialNum attribute is set to a String in my view object, it is a varchar column in the database, but some serial number I enter give a "Error Message: oracle.jbo.domain.Number ". This happens even though the underlying BC4J is returning values for the query. I also get a "500 Internal Server Error java.lang.ClassCastException: java.lang.String on my View object's code at line 65 which is
if (params.length>1) serialCollCdIn = (BigDecimal)params[1];
This is an input paramter to the oracle stored procedure that defaults to a Number value of 1.
Any idea what the problem is? Here is the full code for my view object:
package mypackage1;
import java.math.BigDecimal;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import oracle.jbo.JboException;
import oracle.jbo.domain.Number;
import oracle.jbo.server.DBTransaction;
import oracle.jbo.server.ViewObjectImpl;
import oracle.jbo.server.ViewRowImpl;
import oracle.jbo.server.ViewRowSetImpl;
import oracle.jdbc.driver.OracleCallableStatement;
import oracle.jdbc.driver.OracleTypes;
// --- File generated by Oracle Business Components for Java.
public class LienCheckViewImpl extends ViewObjectImpl
* This is the PLSQL block that we will execute to retrieve the REF CURSOR
private static final String SQL =
"begin pprs_test_wrappers.sn_srch_main_test(?, ?, ?, ?, ?, ?);end;";
private BigDecimal totalRows = null;
private String messageCd = null;
private BigDecimal serialColCd = null;
private BigDecimal maxRows = null;
public LienCheckViewImpl() {}
* Overridden framework method.
* Executed when the framework needs to issue the database query for
* the query collection based on this view object. One view object
* can produce many related result sets, each potentially the result
* of different bind variable values. If the rowset in query is involved
* in a framework-coordinated master/detail viewlink, then the params array
* will contain one or more framework-supplied bind parameters. If there
* are any user-supplied bind parameter values, they will *PRECEED* the
* framework-supplied bind variable values in the params array, and the
* number of user parameters will be indicated by the value of the
* numUserParams argument.
protected void executeQueryForCollection(Object qc,Object[] params,int numUserParams) {
* If there are where-clause params (for example due to a view link)
* they will be in the 'params' array.
* We assume that if some parameter is present, that it is a Deptno
* value to pass as an argument to the stored procedure.
* NOTE: Due to Bug#2828248 I have to cast to BigDecimal for now,
* ---- but this parameter value should be oracle.jbo.domain.Number type.
String serialNumIn = null;
BigDecimal serialCollCdIn = null;
BigDecimal maxRowsAllowed = null;
BigDecimal totalRowsSelected = null;
String messageCdOut = null;
if (params != null) {
if (params.length>0) serialNumIn = (String)params[0];
if (params.length>1) serialCollCdIn = (BigDecimal)params[1];
if (params.length>2) maxRowsAllowed = (BigDecimal)params[2];
storeNewResultSet(qc,retrieveRefCursor(qc,serialNumIn,
serialCollCdIn,
maxRowsAllowed));
super.executeQueryForCollection(qc, params, numUserParams);
* Overridden framework method.
* Wipe out all traces of a built-in query for this VO
protected void create() {
getViewDef().setQuery(null);
getViewDef().setSelectClause(null);
setQuery(null);
* Overridden framework method.
* The role of this method is to "fetch", populate, and return a single row
* from the datasource by calling createNewRowForCollection() and populating
* its attributes using populateAttributeForRow().
protected ViewRowImpl createRowFromResultSet(Object qc, ResultSet rs) {
* We ignore the JDBC ResultSet passed by the framework (null anyway) and
* use the resultset that we've stored in the query-collection-private
* user data storage
rs = getResultSet(qc);
* Create a new row to populate
ViewRowImpl r = createNewRowForCollection(qc);
try {
* Populate new row by attribute slot number for current row in Result Set
//AddedByRegisNum
populateAttributeForRow(r,0, nullOrNewNumber(rs.getBigDecimal(1)));
System.out.println("AddedByRegisNum :" + rs.getBigDecimal(1));
// OrigRegisNum
populateAttributeForRow(r,1, nullOrNewNumber(rs.getBigDecimal(2)));
System.out.println("OrigRegisNum :" + rs.getBigDecimal(2));
// SerialNum
populateAttributeForRow(r,2, rs.getString(3));
System.out.println("SerialNum :" + rs.getString(3));
// SerialNumDesc
populateAttributeForRow(r,3, rs.getString(4));
System.out.println("SerialNumDesc :" + rs.getString(4));
// FlagExactMatch
populateAttributeForRow(r,4, rs.getString(5));
System.out.println("FlagExactMatch :" + rs.getString(5));
// MessageCd
populateAttributeForRow(r,5, messageCd);
// TotalRows
populateAttributeForRow(r,6, totalRows);
catch (SQLException s) {
throw new JboException(s);
return r;
* Overridden framework method.
* Return true if the datasource has at least one more record to fetch.
protected boolean hasNextForCollection(Object qc) {
ResultSet rs = getResultSet(qc);
boolean nextOne = false;
try {
nextOne = rs.next();
* When were at the end of the result set, mark the query collection
* as "FetchComplete".
if (!nextOne) {
setFetchCompleteForCollection(qc, true);
* Close the result set, we're done with it
rs.close();
catch (SQLException s) {
throw new JboException(s);
return nextOne;
* Overridden framework method.
* The framework gives us a chance to clean up any resources related
* to the datasource when a query collection is done being used.
protected void releaseUserDataForCollection(Object qc, Object rs) {
* Ignore the ResultSet passed in since we've created our own.
* Fetch the ResultSet from the User-Data context instead
ResultSet userDataRS = getResultSet(qc);
if (userDataRS != null) {
try {
userDataRS.close();
catch (SQLException s) {
/* Ignore */
super.releaseUserDataForCollection(qc, rs);
* Overridden framework method
* Return the number of rows that would be returned by executing
* the query implied by the datasource. This gives the developer a
* chance to perform a fast count of the rows that would be retrieved
* if all rows were fetched from the database. In the default implementation
* the framework will perform a SELECT COUNT(*) FROM (...) wrapper query
* to let the database return the count. This count might only be an estimate
* depending on how resource-intensive it would be to actually count the rows.
public long getQueryHitCount(ViewRowSetImpl viewRowSet) {
Object[] params = viewRowSet.getParameters(true);
String serialNumIn = (String)params[0];
BigDecimal serialCollCdIn = (BigDecimal)params[1];
BigDecimal maxRowsAllowed = (BigDecimal)params[2];
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Register the fourth bind parameter as our return value of type NUMERIC
st.registerOutParameter(4,Types.NUMERIC);
* Set the value of the 3 bind variables to pass as arguments
if (serialNumIn == null) st.setNull(1, Types.CHAR);
else st.setString(1,serialNumIn);
if (serialCollCdIn == null) st.setNull(2,Types.NUMERIC);
else st.setBigDecimal(2,serialCollCdIn);
if (maxRowsAllowed == null) st.setNull(3, Types.NUMERIC);
else st.setBigDecimal(3, maxRowsAllowed);
st.execute();
System.out.println("returning value of :" + st.getLong(4));
return st.getLong(4);
catch (SQLException s) {
throw new JboException(s);
finally {try {st.close();} catch (SQLException s) {}}
* Return a JDBC ResultSet representing the REF CURSOR return
* value from our stored package function.
private ResultSet retrieveRefCursor(Object qc,
String serialNum,
BigDecimal serialColCd,
BigDecimal maxRows) {
CallableStatement st = null;
try {
st = getDBTransaction().createCallableStatement(SQL,DBTransaction.DEFAULT);
* Set the value of the bind variables
System.out.println("SerialNumIn :" + serialNum);
if (serialNum == null) st.setNull(1,Types.CHAR);
else st.setString(1,serialNum);
if (serialColCd == null) st.setNull(2,Types.NUMERIC);
else st.setBigDecimal(2,serialColCd);
if (maxRows == null) st.setNull(3,Types.NUMERIC);
else st.setBigDecimal(3,maxRows);
st.registerOutParameter(1, Types.CHAR); // serialNum
st.registerOutParameter(2, Types.NUMERIC); // serialColCd
st.registerOutParameter(3, Types.NUMERIC); // maxRows
st.registerOutParameter(4, Types.NUMERIC); // totalRows
st.registerOutParameter(5, Types.CHAR); // messageCd
* Register the 6th bind parameter as our return value of type CURSOR
st.registerOutParameter(6,OracleTypes.CURSOR);
st.execute();
ResultSet rs = ((OracleCallableStatement)st).getCursor(6);
serialColCd = st.getBigDecimal(2);
System.out.println("SerialColCd= " + serialColCd);
maxRows = st.getBigDecimal(3);
System.out.println("maxRows= " + maxRows);
totalRows = st.getBigDecimal(4);
System.out.println("totalRows= " + totalRows);
messageCd = st.getString(5);
System.out.println("messageCd= " + messageCd);
* Make this result set use the fetch size from our View Object settings
rs.setFetchSize(getFetchSize());
return rs ;
catch (SQLException s) {
throw new JboException(s);
finally {try {st.close();} catch (SQLException s) {}}
* Store a new result set in the query-collection-private user-data context
private void storeNewResultSet(Object qc, ResultSet rs) {
ResultSet existingRs = getResultSet(qc);
// If this query collection is getting reused, close out any previous rowset
if (existingRs != null) {
try {existingRs.close();} catch (SQLException s) {}
setUserDataForCollection(qc,rs);
hasNextForCollection(qc); // Prime the pump with the first row.
* Retrieve the result set wrapper from the query-collection user-data
private ResultSet getResultSet(Object qc) {
return (ResultSet)getUserDataForCollection(qc);
* Return either null or a new oracle.jbo.domain.Number
private static oracle.jbo.domain.Number nullOrNewNumber(BigDecimal b) {
try {
return b != null ? new oracle.jbo.domain.Number(b) : null;
catch (SQLException s) { }
return null;
Natalie

New iPhone user needs guidance setting up 4 iPhones for family - best approach?

Hi - I'm a new iPhone user tasked with setting up 4 iPhones for family (three 4S, one 3GS). I set up the first 4S using my mother's existing Apple ID (she has an iPad) and I think (hope) hers is fine. When I set up my father's phone, my sister said to enter my mother's Apple ID during setup since they wanted to use a single Apple ID for iTunes purchases. The setup screen I'm referring to the 7th screen into the setup process for a new iPhone 4S (after the Welcome, Language, Country/Region, Location Services, Wi-Fi Networks, and Set Up iPhone screens), where it asks you to "Sign In with an Apple ID" or "Create a Free Apple ID". This screen was where I entered my mother's Apple ID into my father's phone.
By entering my mother's Apple ID on my father's phone at this point during setup, I seem to have created a "clone" of her phone - their phone numbers are distinct and they can call each other but iMessages sent to either of them initially appeared on BOTH phones. I think I have now fixed that by creating a separate Apple ID for my father after the fact and entering it under Settings>Messages. Thinking I could also enter his new Apple ID under Settings>iCloud, I found I could not change it from my mother's Apple ID (it's greyed out). I saw a recommendation in another post to click on the red "Delete Account" button at the bottom, but will that delete my mother's entire account or only its association with my father's phone?
Backing up a step or two, I'm worried that at this point I should have entered/created a new Apple ID on screen #7 during initial setup of my father's phone (instead of entering my mother's Apple ID), and that just changing settings in iMessage, iCloud, etc. won't really fix any problem(s) I've created. I hesitate to set up the other two phones before knowing how badly I've already messed things up with this one.
During the initial set up of my father's iPhone, should I have created/entered his own unique Apple ID on screen #7 instead of entering my mother's Apple ID? (and then on his phone AFTER setup was complete, changing to my mother's Apple ID under Settings>Store so that all purchases are shared)?
If yes, do I need to restore his phone to factory settings and set it up as a new phone so his phone behaves like his and not a clone of hers?
Without knowing what might be the best way to set up these 4 new iPhones, I was thinking the four unique users of these new phones would most likely want to share apps (by purchasing them with one Apple ID), backup/synch to one computer, but maintain separate iCloud accounts so everyone's info is private? I've spent time reading other posts and see so many different recommendations for families with multiple devices that my head is spinning. Many include questions from folks migrating from older phones or MobileMe. I think my situation is simpler in that there are 4 new iphones and one existing Apple ID. Have I missed some comprehensive post that clarifies the best way to set things up for families new to iPhones, or do needs vary so much that no single best way exists? Given my situation (and depending on which way I should proceed regarding having set up my father's phone with my mother's Apple ID), should I create/enter a separate Apple ID for each new phone user during initial setup so each phone is distinct from the others, and AFTER setup is complete, changing the iTunes and Store info to the shared Apple Id for purchases? Or can I customize each individual phone after the fact in Settings>Whatever so that even if I've entered the same Apple ID on Screen #7 during initial new phone setup, the 4 phones will ultimately be set up correctly?
So sorry to have to ask such basic questions. Many thanks, in advance, for any guidance provided to help me not make any (more?) mistakes during setup that will be a real headache to remedy later, once everyone has started using their phones.

Hi edgefield,sorry you're having so much trouble.
FIRST CREATE A BACKUP ON YOUR COMPUTER -ALWAYS BEFORE PLAYING WITH THE INFORMATION ON THE PHONES (it prevents losses)
Now I'll answer your questions)
During the initial set up of my father's iPhone, should I have created/entered his own unique Apple ID on screen #7 instead of entering my mother's Apple ID? (and then on his phone AFTER setup was complete, changing to my mother's Apple ID under Settings>Store so that all purchases are shared)?
Yes. Create his own apple id and sign him in. then tap settings ->store -> tap on the account name -> sign out.
Then sign in your fathers apple id. (create your fathers apple id on the computer, its much easier, trust me).
If yes, do I need to restore his phone to factory settings and set it up as a new phone so his phone behaves like his and not a clone of hers?##
No. Tap settings -> icloud, and turn everything off (keep on the phone option). Then DELETE ACCOUNT (it's got red around it and at the bottom of the screen if you scroll down). You cannot sign out of iCloud, you can only delete the account. Then clean up the contacts and information on the phone.
Then you tap settings -> iCloud and sign in. Put your fathers apple id in the section. His information will be uploaded to www.icloud.com. Then go to www.icloud.com and sign in with his apple id. Make sure his information is uploaded (you'll have to select timezone and such).
From that point you are fine except for iMessage.
For iMessage to function properly, only one apple id can be signed into the iTunes store (settings -> store). If they are both signed into the same apple id on the iTunes store, than you need to turn off iMessage on one of the phones. The iMessage may be delievered to either phone when both are signed in under the same apple id in the iTunes store.
tap settings -> messages -> imessage off
This also disables facetime. If you want them to have iMessage and Facetime, they have to have seperate apple id's signed into the iTunes store.
Have I missed some comprehensive post that clarifies the best way to set things up for families new to iPhones, or do needs vary so much that no single best way exists?
Not that I've seen, will consider creating one if I have time.
Given my situation (and depending on which way I should proceed regarding having set up my father's phone with my mother's Apple ID), should I create/enter a separate Apple ID for each new phone user during initial setup so each phone is distinct from the others, and AFTER setup is complete, changing the iTunes and Store info to the shared Apple Id for purchases?
Your best bet is to create each apple id on the computer (keyboards are easier to use) and then sign them each in during the creation process. Then change the iTunes store info to the stored apple id.
This will allow each person to serpate iClouds without interfering with each others Cloud as you set up new devices.
Or can I customize each individual phone after the fact in Settings>Whatever so that even if I've entered the same Apple ID on Screen #7 during initial new phone setup, the 4 phones will ultimately be set up correctly?
Doing it this way can cause problems (or used to, not sure if it still does), initially, when you set it up, it wants to create a backup or upload the blank info to iCloud. You are better off setting up their own apple id first and signing in with that, and then changing it in the iTunes store.
I'm off to bed, I'll check this thread tomorrow and see if you have any more questions/problems. Remember, always create a back-up before you do anything.

Newbie needs help with MS exchange / MS Push email

I just got an iPhone 3G a few days ago. Heretofore, all my experience has been with HTC, Motorola and Blackberry phones. As a non-technical person trying to make Pust work through my network is very confusing.
I read the instructions / bulletins and finally made email and calendar work (sort of). It only works on WiFi and then I have to manually update mail as it does not always Push.
Does the iPhone Push setup only work with Server 2003 / Push via WiFi? If not, can anyone give me step by step instructions on how to make it work with 3G and no WiFi?
If possible, please be specific as I am a newbie trying to make this work for my small company.
If I can't find a solution I'll have to get rid of this and go back to something that works.
It seems that Apple is making it very difficult to set this phone up for Push application
Thanks,
Gary

The iPhone works fine over cellular. You did mention a certificate - I am going to guess that this may be the issue.
If you open Safari on the iPhone and connect to your OWA, do you get a warning? When you viewed the cert in IE, is it self-signed? If so you need to get it on the iPhone. The easiest way is to set up gmail or something similar on iPhone and email it to yourself.
when it come in email your iPhone will immediately recognize it as a file that you can import it. Select it and import it, then you should be able to connect to your Outside Exchange server.

Newbie needs guidance on BC4J

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