Working with DataProvider - tutorial

I created a page following the instructions in the 'Working with Data Provider' tutorial - for page2. i.e., I created a page with some fields bound to a data provider (at page level) whose rowset is in session bean. The page has commit and reset buttons too.
It works fine if browser back / refresh buttons are not pressed. If I press the browser back button, change some data and press commit... it changes some other record. The same is true with refresh.
I tried some common technics like, preventing page caching or using redirect... but no success so far.

There are some known issue with JSF 1.1 and back button. Creator 2 is based on JSF 1.1. Most of these issues are addressed in JSF 1.2. Future version of Creator will use JSF 1.2
- Winston
http://blogs.sun.com/roller/page/winston?catname=Creator

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Trying to get MySQL to work with Oracle Tutorial

Hi,
I was attempting to work through the following tutorial Build a Web Application with JDeveloper 11g Using EJB, JPA, and JavaServer Faces
http://www.oracle.com/technology/obe/obe11jdev/11/ejb/ejb.html
But with a twist that I want to attempt with MySQL. Whilst MySQL is working fine in the IDE when I test the javaServiceFacade it fails as the construct/syntax of the sql command is incorrect :-
SELECT rowid, contractno, fax, advert, status, remark, tel, kva, lastuser, createddate, type, postcode, contact, country, modified, refno, address, email, custname FROM "enquiries" WHERE (refno LIKE ?)")
You note the "enquires" which for mysql should not have the quotes and is causing error.
I have looked at persistance.xml and it looks ok. Even tried setting database to MySQL4
Any suggestions to what controls the SQL syntax?
James
excerpt from persistance.xml
+<properties>+
+<property name="eclipselink.target-server" value="WebLogic_10"/>+
+<property name="javax.persistence.jtaDataSource"+
+value="java:/app/jdbc/jdbc/main_MySQLDS"/>+
+<property name="eclipselink.target-database" value="MySQL5"/>+
+<property name="eclipselink.jdbc.native-sql" value="true"/>+
+</properties>+
+</persistence-unit>+
+<persistence-unit name="genesys" transaction-type="RESOURCE_LOCAL">+
+<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>+
+<class>genesys.Enquiries</class>+
+<properties>+
+<property name="eclipselink.jdbc.driver" value="com.mysql.jdbc.Driver"/>+
+<property name="eclipselink.jdbc.url"+
+value="jdbc:mysql://127.0.0.1:3306/main"/>+
+<property name="eclipselink.jdbc.user" value="root"/>+
+<property name="eclipselink.jdbc.password"+
+value="B0855467D54C688144F5AA7621CE386D"/>+
+<property name="eclipselink.logging.level" value="FINER"/>+
+<property name="eclipselink.target-server" value="WebLogic_10"/>+
+<property name="eclipselink.target-database" value="MySQL5"/>+
+<property name="eclipselink.jdbc.native-sql" value="true"/>+
+</properties>+

I am trying to do the same thing, but in my case I am using my onkyo receiver to do the decoding. I have a minijack converter to coax in the mic jack of the card. I switched the options to digital i/o out. This does work, but I can only get stereo sound. When I play my 5. dvd, it still plays it in stereo sound. I have all the settings correct, as I can get 5. sound out of my onboard coax but not the creative extreme music. It also greys out the option for passthru(external source decoder).
My roommate has the platinum creative sound card with the front panel with coax/optical out right on it, he has WAY more dobly/dts options in his menu settings and is able to send 5. out easily. auto detects it and with minor tweaks, gets 5. out thru either optical or coax.
I thought this card supported 5. coax out thru the digital port. I just dont think it does, the options are missing from the menu all together, and yes I have the most recently updated webupdate. I can get stereo sound thats it. Funny how my realtek onboard does a way better job then this "higher end" sound card.
Am I missing something maybe? Please help, I would like to get this going, or at least get a solid answer if this is even possible so I can stop wasting my time with it.
Thanks,
Joe

Working with interdependent listboxes: A tutorial.

Working with interdependent listboxes in Creator.
I have an application with several listboxes that are interdepoendant of one another. That is to say, that when one entry gets selected, the value on one or more other listboxes gets updated.
When I first coded up a solution for this, I was having trouble with some errors thrown internally to the components. After a lot of digging and with the help of Sun, I was able to cure this problem, so I am writing up this brief tutorial to help others do something similar.
Let me tart of with what the application looks like:
The GUI
In this application we have three listboxes and some 2D and 3D images that get loaded based on the values selected in those listboxes.
When the first listbox is changed, then the second and third listboxes automatically get changed based on the value selected in the first. In other words, the value selected in listbox1 will be retrieved and then that value will be used to retrieve data (in my case from a database) to be used in populating the second and third listboxes.
Let�s also say that we want to automatically select the listbox entry if only one item exists.
What Creator Does Today
In Creator 1, when you drop a listbox on a page a defaultListboxItems list gets created for you in the backing page bean. This is what you would normally expect to add items to fill your listbox.
Of course, this data gets reset for every refresh of that page. In our case, when we select an item on on of the listboxes the page will be refreshed (Submitted). Because of this, you might place a list in the session bean and retrieve it in the page bean�s constructor (which of course gets called for each page refresh) and use that list to rebuild your defaultListboxItems list.
That however, as I found out, is probably not the best way to do it.
The �Right� Way
As mentioned above, we need a way to keep the values of the listboxes saved off in between page refreshes.
The way to do this is to place that into the session bean and only there. In other words, you will not be using the defaultListboxItem list that Creator set up for you inside the page bean. Instead, you will create your own which will look something like this (again, this code will go inside of the session bean):
    private DefaultSelectItemsArray defaultListbox1Items = new DefaultSelectItemsArray();
    private DefaultSelectItemsArray defaultListbox2Items = new DefaultSelectItemsArray();
    private DefaultSelectItemsArray defaultListbox3Items = new DefaultSelectItemsArray();You will also want to create lists that hold the raw data like this:
private List listbox1;
private List listbox2;
private List listbox3;In addition, you want to save the currently selected index so:
private String list1SelectedIndex;
private String list2SelectedIndex;
private String list3SelectedIndex;You will then use the �setters� to these lists to fill your default items doing any conversion you need to perform. For example:
public void setList1(List list1)
        //Build the defaultPatientListboxItems entries
        defaultListbox1tems.clear();
        Iterator listIterator = list1.iterator();
        while (list1Iterator.hasNext())
            String entry = (String)list1Iterator.next();
            SelectItem selectItem = new SelectItem(entry, entry);
            defaultListbox1Items.add(selectItem);
        this.list1 = list1;
    }Now to let JSF know that you are using the session bean to hold your data rather than the default list that Creator built, we will need to go in and modify the JSP (note that I think this step is being included in Creator 2�s IDE as something you will no longer have to code by hand).
Here is example of how that will look:
<h:selectOneListbox binding="#{PageName.listbox1}" id="listbox1" immediate="true" onchange="this.form.submit();"
                                size="5" style="height: 184px; width: 234px" styleClass="centeredPageStyle" value="#{SessionBean1.listbox1SelectedIndex}" valueChangeListener="#{PageName.listbox1_processValueChange}">
                                <f:selectItems binding="#{PageName.listbox1SelectItems}" id="listbox1SelectItems" value="#{SessionBean1.defaultListbox1Items}"/> Note in particular the value = SessionBean1.listbox1SelectedIndex and the value = SessionBean1.defaultListbox1Items.
The first one is saying what the current selected entry is and the other is saying that the list that backs the listbox is called.
Remember when I said that we wanted to autoselect an entry if only one entry existed inside of the listbox? Well, that is why we set the value = SessinBean1.listbox1SelectedIndex. Along with this, we need to modify a �getter� in our session bean to look something like this:
public String getListbox1SelectedIndex()
        if(list1 != null && list1.size() == 1)
     //DO ANY CONVERSION NEEDED HERE
//IN OTHER WORDS, IF YOUR LIST DOES NOT
//HOLD STRINGS, THEN READ THEN OBJECT
//FROM THE LIST AND GET THE STRING VALUE
//FROM THAT OBJECT YOU USED TO ENTER
//INTO THE LISTBOX
            ImageSet imageset = (ImageSet)list1.get(0);
            return imageset.getSetName();
        return this.list1SelectedIndex;
    }Now we have all of the data we need stored off, all we need to do is make sure that when the page bean�s constructor gets called, we �prime� the pump to make sure everything gets auto-selected.
We can do that with something like this (placed inside of the page bean�s constructor):
List listbox1List = sessionBean1.getPatientList();
if (listbox1List != null && listbox1List.size() == 1)
               String listbox1Value = (String)listbox1List.get(0);
               sessionBean1.setListbox1SelectedIndex(listbox1Value); //This does it
               processListbox1Change(); //Do whatever you need to do in this case here
}Well, that's all there is to it. Hope this helps!

Hi Darrin,
This is fantastic!!!
A sample application by name "CoordinatedDropdowns" is also available. I am sure the sample application and your tutorial will be of great help to many Creator users.
Cheers
Giri

Working with OLAP Workbooks Tutorial

Hi all!
I'm new to BI and I'm learning BI discoverer at the moment. I have installed Sales History schema (though with problems and I had to create and fill some tables additionally). I have completed the Working with Relational Workbooks successfully but now I have a problem with starting the Working with OLAP Workbooks Tutorial. The thing is, there is no objects found in any of the Discoverer Workbooks folders, so there is no Corporate Profitability workbook. Can these be because of the installation problems I had or are there just some privileges missing for SCOTT user? It is in Oracle Discoverer Catalog Selected Users/Roles group.
Can somebody please tell me what could be wrong? Or maybe a list what objects should exists in database so I can check if the installation created them successfully.
Thanks!
Bye

I think the workbooks created with OLAP are stored in catalog. Is it ok to export and import the catalog.
thanka
kiran

Anyone recommend a good tutorial for 'working with video' in Logic?

I've worked with video a fair amount, but only ever skimmed the surface and found odd workarounds to get things to happen how I want them.
The manual is scant when it comes to features such as SMPTE locking and beat mapping scenes to bar lengths and all sorts of other tricks I'm probably unaware of.
The only Macprovideo I can find is from 2005 and whilst I'm sure has some common features, is perhaps not up to date enough. And this http://www.soundonsound.com/sos/jul07/articles/logictech_0707.htm is ok for a quick overview but I'd like to see some of it in action (or at least have more detailed exercises).
Does anyone know any tutorials they'd recommend? Cheers

canon pixma 6200 series works

After upgrading to Lion internal mic does not work with Facetime

After upgrading to Lion internal mic does not work with Facetime. The mic is picking up sound as noted in System Prefs. This was working just fine before the updgrade. Facetime works OK on my iPod.

you have in french a tutorial to recreate your partition here
Rebuild partition with Recovery HD lion after upgrade to 10.7.2
i tested, it's work !
For your wifi problem:
Try to change your setup of wifi, look this table given by apple:
I changed my wifi setup wep to wpa and it's work !

Is there a way to make an audio clip not cover the whole project? I want to add audio clip or song and let it start at a certain point in the project. I'm working with iMovie on IPad!

Is there a way to make an audio clip not cover the whole project in iMovie? I want to add audio clip or song and let it start at a certain point in the project. Whenever I add audio or song it covers the whole project. I'm working with iMovie on IPad!

Thank you for your reply Karsten but unfortunately this didn't help me so far. Or maybe I'm missing something?
First the link is a tutorial for iMovie on a Mac. I'm using iMovie on iPad so the steps are inapplicable.
Second it is only possible for me to manipulate the end part of the sound clip to whichever duration I want. But I can't do the same with the 'beginning' of the sound clip.
I simply want to place some photos in the beginning of my video with no sound in the background then after like 2 secs I want to start the music clip. For some reason that is not possible! Cause every time I drop the music clip unto my project timeline it automatically place it self along with the first frame in the project! And consequently the photos and music are forced to start together.
Hope I'm making sense...

How to use a mysql built-in function with dataprovider

hi.
I want to use a mysql built-in function, for example, MD5() on a column when updating a table with dataprovider.
Something like this doesn't work:
MyDataProviderOne.setValue("tablename.field_name", "MD5('some text')");
How should it be done?
thanks.
Mike.

hi.
thanks. this helped, but I'd like to use also different functions, that's why, I'd rather do it by MySQL built-in functions with dataprovider... Is there any way to do that?
best regards.
Mike.

How to work with an EXISTING wordpress site in side DW CS5 (yahoo hosted)

Have and existing Wordpress site that is hosted by Yahoo. Recently upgraded to Dreamweaver CS5. Was really excited about working with my Wordpress files inside of DW CS5 with all of it's new capabilities, bells and wistles. I can't seem to get it set up right.
Is Dreamweaver CS5 ABLE to display existing wordpress sites with dynamic content? And can anyone please help me figure out how.
I have been thru several lynda.com video tutorials including:
Dreamweaver CS5 and Wordpress 3 by Joseph Lowery (over the last month)
Dreamweaver CS5 with PHP and MySQL by David Gassner (over the last month)
PHP with MySQL essetial training by Kevin Skoglund (about a year ago when trying to learn php)
Self-hosting a Wordpress site (about a year ago when I set up the site)
I have also been scouring this forum and the web trying to find the answer to what seems to be a very common problem.
Using Mac OSX 10.6.6
MAMP
Dreamweaver CS5
Wordpress 3
Yahoo web hosting
Everything works fine with the exercise files but as soon as I try my existing site files it gives me one of several errors
cannot establish a connection to the database
I set up my site thur the DW site manager with the
Local Site Folder set to: /applications/MAMP/htdocs/nate
server set to:
name: testing
connection using: local/network
server folder: /applications/MAMP/htdocs/nate
web url: http://localhost/nate
under the advanced tab i have set the server model to: php mysql
and have the testing box checked in the site set up dialog box
I also set a remote server:
name: remote
connect using: ftp
ftp address: ftp.MY_SITE_NAME.com
username: myusername@MY_SITE_NAME.com
password: mypassword
under the advanced tab i have the server model set to: php mysql
and have the remote box checked in the site set up dialog box
when tested connection was made. I also downloaded all of my site files using this connections (it took hours).
I installed MAMP and set the ports to the defauls (80, 3306) host: localhost username: root password: root
If i change the database settings in the wordpress wp-config.php file to: localhost, root, root it works and displays my page as I would expect in live view or browser but without the main content area or posts - displays a 404 error where the content should beI have exported my wp database and imported back into my local testing server thru phpmyadmin.
I have also gotten this error at various tries in the set ups: "dynamically-related files could not be resolved because of an internal server error"
I am currently getting this error: "Dynamically related files could not be resolved because the site definition is not correct for this server"
It is not asking me if I want to save files to the server when I hit live view.
Everything works fine with the lynda.com exercise files and with the generic wordpress files. I can open any page - live view or view in browser - can access and modify the imported database thur dreamweaver and phpmyadmin. I am only having these problems with my existing site files. I have done the complete set up at least 5 times from scratch going thru the videos and various tutorials step by step. I dont want to use the starter files that come with wordpress installations I want to use my highly modified pages/themes/database

DW does not work with a WP installation that has anything other than the default (numeric) permalinks. Apparently no-one ever tested this case during the development and prerelease phase, which is a shame, because very few WP installations use default permalinks. It's a point that Joseph Lowery doesn't touch in his tutorial, and of course the tutorial WP installation works perfectly.
Hope that helps, although it may disappoint (as it did me, and a lot of other folks). Here's hoping this is addressed in a dot release.
Alan

FAQ: Will Photoshop Elements work with my camera, or Why won't my raw files open?

What is a raw file?
A raw file is the unprocessed light data that was captured by your camera sensor. The only settings on your camera that apply to this file are aperture, shutter speed, and ISO. This means that any settings you may have applied to the file, such as white balance, or black and white effects, have no effect. Because this sensor data is raw, it must be processed or baked into an actual image file, that's where the Adobe Camera Raw (ACR) plug-in comes in.
What is Adobe Camera Raw?
ACR interprets the raw data and makes image information out of it. But every camera has a unique sensor and thus has a unique form of raw file. Even though camera manufactures may use the same file extension each time (e.g. Nikon raw files are always .NEF), each camera model has a different way of storing information. Because of this, we must continually update ACR for new cameras. As we add new cameras to the list (over 300 now) we update our published list of supported cameras. Additionally, with the changes to ACR, newer releases will not always be compatible with older versions of Photoshop Elements.
So, will the my raw files work with Photoshop Elements?
So if you are wondering if your camera is supported by ACR or will work in Photoshop Elements, first check this list:
Camera Raw plug-in | Supported cameras
Once you know whether your camera is supported by ACR and by which version, check this list to see whether your version of Photoshop Elements supports that version of ACR or later:
Camera Raw-compatible Adobe applications
If your version of Photoshop Elements should open raw files from your camera, make sure you have the latest version of ACR installed. Go to Help > Updates to install the latest ACR release.
You can also manually download and install ACR updates:
Macintosh
Windows
What if my camera is not compatible with my version of Photoshop Elements?
Supposing you have a camera that came out after the release of a newer version of Photoshop Elements, so that your version of Elements is no longer recieving updates, you have two basic options:
Purchase the latest version of Photoshop Elements that supports your camera.
Use the latest version of the free DNG Converter (for Macintosh or Windows)
You can convert your files to the universaly compatible DNG format (the files will work with any version of the Camera Raw plug-in). See In depth : Digital Negative (DNG) for more information.
Where are all of the tools and options that I've seen available in tutorial books and videos?
Photoshop Elements has fewer tools and options than it's parent Photoshop. These differences are documented here:
Adobe Camera Raw differences between Photoshop and Photoshop Elements
Additional resources
For more inforamtion on Adobe Camera Raw, please check these links:
Troubleshoot Camera Raw
Why doesn’t my version of Photoshop or Lightroom support my camera?
In depth: Camera Raw
Julieanne Kost's Camera Raw video tutorials
Adobe Camera Raw turns 10

Hi Joshua ,
I would like to know few things before I assist you any further.
Which version of Android are you using?
What kind of PDF file it is?
Try uninstalling the app once and they try to reinstall .
See what happens.
Regards
Sukrit Dhingra

Why is working with Adobe so frustrating?

I am trying to import RAW CR2 files into Photoshop Elements 10. I have downloaded the DNG converter vs 7.1, which tells me that I need the Application manager to install. I download the manager, only to be told there is a problem with it, download it again.
I have now been going round in circles for an hour, and am no closer to being able to import and work on my RAW files than I was at breakfast time.
Any help appreciated. In an age when computer software is increasinly intuituve, I am finding working with Adobe extremely frustrating.

It’s not clear. Do you wish to import your CR2 files or convert them to DNG. PSE10 will support all Canon cameras, except the 60DA provided you have updated to the latest camera raw plug in (From the Editor click Help >> Updates)
So your options are (1) Update PSE 10. (2) Download, unzip and extract, and install the free Adobe DNG converter to convert your CR2 files to the Adobe Raw format and the files will open in all versions of PSE and other Adobe applications (keep your original CR2’s as backup or for use in Canon software) see the latest links below:
Windows download click here DNG Converter 7.1
Mac download click here DNG Converter 7.1
You can convert a whole folder of CR2 images in one click. See this quick video tutorial:
You Tube click here for DNG Converter tutorial

JSP include directive not working with Tomcat 5.0

Hi.
I'm developing a small JSF webapp under Tomcat 5.0. My idea was to use the include directive to display a navigation panel on every JSP page.
I took the code straight from the Java Web Services Tutorial; the resulting page looks like this:
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:h="http://java.sun.com/jsf/html"
       version="2.0">
<jsp:directive.page contentType="text/html;charset=iso-8859-1"/>
<%@ include file="/jsp/panelpage_header.inc" %>
     <h:outputText value="Welcome!"/>
<%@ include file="/jsp/panelpage_footer.inc" %>
</jsp:root>However, when I try to load the page, a compilation error occurrs:
org.apache.jasper.JasperException: /trias/welcome2.jsp(11,2) The content of elements must consist of well-formed character data or markup.
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...I checked the path to the included files, and it seems to be okay. The files themselves contain the JSF tags for the view, html-head, html-body etc. The compiler doesn't even care if the files exist or not because it aborts immediately when it reaches the first include-statement.
Did anyone see this kind of error before?

Ok, the solution with jsp:directive.include works,
if header.inc and footer.inc themselves are well
formed too. If I understood the concept right this is
because header and footer are processed during
request time and therefore interpreted as
'standalone' pages.This isn't true. The include directive (<jsp:directive.include>) is run a Compile Time. The code is inserted directly into the surrounding JSP (unlike <jsp:include> which forwards the request at runtime). The finished JSP, after the include, is then processed and needs to be well-formed XML.
>
But: What can I do when these two files define a tag
that should enclose my current page (for example,
header opens a panelGrid-Tag, and footer closes it).
For this case I thought the use of the
@include-directive would be neccessary to combine the
three pages during compilation. By this the resulting
page would be well-formed although header and footer
are not.It should be, as long as you are using <jsp:directive.include>, and the rest of the included pages are also well formed (no <% %> tags, nothing else out of place...).
Honestly, I haven't done much work with JSP documents, so I haven't run into this problem. But I do believe everything I said is correct.
What I would do is double check the correctness of the rest of the included pages and see if your error isn't something else.

Looking for a preloader that would work with my fullscreen (liquid) flash

Hi!
I'm building my own Flash website using a fullscreen (liquid
layout) Flash tutorial that I found somewhere (can't remember
where)...
I was having problems with a preloader that I've been using
(modifying) for my Flash jobs... I decided to keep working on my
website anyway and get back to that later... But now it's just
annoying me and I'd really love to figure out how to get a
preloader to work with my site.
My site is not complete yet, and it's probably not built the
best way it should (my first full-flash website!.. plus I'm a
designer, I really suck with code) but here's a link to download my
zipped .fla file (Flash CS3) + fonts (don't know if you need that
but anyway):
http://www.studioorangedesign.com/SOD_site.zip
Hopefully, you guys can tell me how I could get a preloader
to work with my site.
All I really need is to have a really simple clean font that
shows a percentage going up or a bar filling up... nothing fancy
needed here...
Thanks!

Hi there,
The following code is what I use for preloading. You have to
put it on the first frame. I think you will be able to attach it to
your own code.
//Actionscript 3
stop();
this.addEventListener(Event.ENTER_FRAME,testInterval);
function testInterval(e:Event):void{
var nLoadedBytes:Number = loaderInfo.bytesLoaded;
var nTotalBytes:Number = loaderInfo.bytesTotal;
//trace (nLoadedBytes / nTotalBytes * 100)
percent.text = Math.round(nLoadedBytes / nTotalBytes * 100)+
“% complete”;
//trace (nLoadedBytes / nTotalBytes * 100)
if (nLoadedBytes >= nTotalBytes) {
trace(”load complete”);
this.removeEventListener(Event.ENTER_FRAME,testInterval);
play();
//End
Creation site internet |
Radins
|
Jeux Concours |
Programme TV

Coldfusion essential training, working with databases

I am currrently working through the videos coldfusion9 essential training, the current folder is working with databases, after following the tutorial very carefully on section 4.08 "Creating an application directory and home page"
It states making a new project & naming it " Photo Gallery" after going through the process, of setting up the project and copying and pasting the relevant files into the folder, there are now four folders in the project namely" home, images, Image source and styles.css"
The tutorial then tells you to click on the "home" file and inside there are default.htm files, this file opens fine in the browser and shows all the details and banner and color, the tutorial goes on to say right click the default.htm file and change it to index.cfm
after making this change however and loading up the page as a cfm file all it shows is the text of the page with no banner or color
can anybody help to throw some light on the problem thanks
dm

Lynda.com Tutorials by David Gassner

Cant work with 32 bit image files?

Hi there, I am unable to work with 32 bit image files on our cs6 ? I am fallowing a tutorial and a person creates a new file with 32 bit channel selected from dropdown menu, and starts painting on it he is using CS5. When I create a 32 bit file and select the brush tool, it comes on with circle and cross line and error comes up saying that the brush tool is not supported with 32 bit image files, in fact, I cant use any tools on the 32 bit images, I can't even create a new layer on the file. There is one thing I can do, which is a great feature, I can save it! But it's not much of a use now is it? If the image is plane white sheet. Is this a special feature that you need to purchase seperetly? Could you please advise. Regards

Hello again,
so resetting the preference file makes no difference to the problem.
I checked 6 of our macs. 3 of the macs can create the 32 bit images and allow paint and other tools with no problem. Jet the other 3 macs have the same problem as I have. I checked my 2008 macbook which has CS5, and it can also edit 32 bit files. Checked my PC yesterdey which has CS6 installed, can't work with 32 bit image files.
I find this very odd, some work and some don't. Any suggestions would be great. Please also find a screenshot of the mac with the issue.
Kind regards,

Working with DataProvider - tutorial

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