AT commands and Com port

Connection to the com port is ok and i can send AT commands.
But i need to make a few AT commands one after another. And i think i am getting errors..anyone can help?
                    outputStream.write("AT+CMGF=0\r".getBytes());
                    outputStream.write("AT+CMGS=153\r".getBytes());
                    outputStream.write(commandString1.getBytes());
                    outputStream.write("\u001a\r".getBytes()); // ctrl + Z
                    outputStream.write("AT+CMGS=153\r".getBytes());
                    outputStream.write(commandString2.getBytes());
                    outputStream.write("\u001a\r".getBytes());
as u see there are 2 "at+cmgs=153" i guess this is where the problem lies...

You must wait for the replies. I've not done this in java, but I have in VC++ and I remember that the Hayes AT commands are reversing half duplex. When you send a command read the incoming data until you see a carriage return.

Similar Messages

Need a gui to send simple ascii commands to com port

I am not a programmer. Several years ago I took a class in Java. Now, I am looking for a gui with buttons that are programmed so that when clicked on with mouse a command (ascii or hex) will be sent to the com port. I am pretty sure that I don't want to read from the port. I have a table of commands that I want to match up to some buttons - a simple way of putting it.

Before you embark on Swing and javax.comm, I'd encourage you to get up to speed with basic Java. A lot has changed in the past couple of years, and getting some practice with the basics will save you a great deal of frustration. Here are some recommended resources:
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Cant find Palm and com port 3 unavalabe

Hi I haven't been able to hot sync for a few months. i get the above message when trying and can't, don't know how to, get my lap top to find my palm. I've read some of the forums and might need to hard reset my unit but I'll loos too much info since my last hot sync. Mike
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Are you syncing via bluetooth or cable? A com error usually indicates that you are trying to do a bluetooth sync. Make sure hotsync manager is set up correctly for whatever one you are trying to do
Local USB for Cable
Local for Bluetooth
A simple restart of the computer usually sometimes rectifies a com error also.

How to use shared variables to address multiple Watlow controllers on the same COM port

Hello,
I am trying to use LabVIEW 2010 to control 4 Watlow temperature controllers on one COM port. 3 are Model 96 and 1 is an EZ zone controller. Each controller has a unique modbus address, and I am trying to read from and write to individual registers (such as closed loop setpoint) using shared variables. I am getting return data when reading (although the data appears to be invalid), but am unable to change the value in the register by writing. How can I be sure that the Modbus server is sending commands to the correct controller?
Chuck
Solved!
Go to Solution.

Peter,
Thanks for the reply. I have actually solved that problem. I realized that the Modbus server address has to be the same as the controller's Modbus address.
I have, however, run into another problem. Perhaps you could help me with that. I have a system with 4 Watlow controllers, 3 are series 96 controllers, one is PID only and 2 are ramping. The 4th controller is an EZ zone. I am using RS485 for communications and the controllers are all wired in parallel for communications and power.
I have set up 2 Modbus servers for 2 of the controllers.
This is the first I have ever worked with Modbus based communications. I have successfully programmed using the Modbus read/write VIs, and am wanting to move to shared variables. My questions right now revolve around addressing, Modbus I/O servers and COM ports. Specifically, at this point, I know the addresses need to match up between the server and the slave device (Watlow controller in my case), how many servers can I create and use on one COM port? If the number is limited, is there a way I can specify an address that I want the server to talk to? Will the broadcast mode work to request data values from the controllers?
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Thanks.
Chuck

PC Suite with Nokia 5700 uses two COM ports?

I am using Nokia PC Suite 6.84 with a Nokia 5700. The phone is connected to the laptop via a USB cable. I have installed the software on two separate laptops, one running XP with Service Pack 2, another running Vista.
Whenever I plug-in the phone, I see two COM ports associated with it. The first COM port shows up in Window’s device manager as COM port 6 (see attached JPG), however, this COM port seems invalid. When I use HyperTerminal, I see two COM ports displayed: COM port 6 and COM port 7. Using HyperTerminal, I can communicate with the Nokia 5700 on COM port 7 but COM port 6 is always unresponsive.
Can anyone tell me:
1. Why two COM ports are used with the Nokia 5700 and PC Suite?
2. What is the purpose of these two COM ports?
3. Are they always contiguous? On different computers, I have seen the Nokia phone bind to COM ports 6 and 7, 9 and 10, and 10 and 11.
NOTE: I could not attach the file as a JPG, so I renamed it with a *.log extension. Just replace with .log with .jpg and view it in any browser.
Attachments:
NokiaComPortProblem.log ‏82 KB

So, nobody knows for what it is?
Symbian freeware http://symbiancorner.blogspot.com

Commands to FTDI virtual COM port via NI VISA interfere with communication with FTDI chip using D2XX drivers

Hello!
I am trying to communicate with a DLP Design module DLP-USB1232H which uses an FTDI chip. My program uses the D2XX drivers. It works, but...
In another program that runs at the same time, I'm communicating with another instrument via a virtual COM port (VCP) that uses an FTDI UART. In this program, I use the VISA Serial Port functions. It works, too, but...
The first program has the capability of listing all the FTDI devices in the system prior to choosing the right one to communicate with. When the VCP is plugged in, it lists it (FT232R USB UART) along with the DLP-USB1232H and communication with the latter device works. But as soon as the second program sends a command through the VCP, the first program no longer "sees" any FTDI device. It stops working.
I have tried 2 different FTDI VCPs; one a standalone cable and the other built in to the instrument.
I’m using Windows 7 32-bit. My programs are both LabVIEW 8.5 executables.
Is VISA "taking over" the channel to the DLP-USB1232H? Does someone who understands NI's implementation of VISA have any ideas on why VISA is doing this? Or if something else is going on?
I'm also interested in workaround ideas. I've tried a "Prolific" VCP, but most drivers don't work and the one that doesn't give an error in Device Manager doesn't communicate with the instrument.
Cheers
Halden
Solved!
Go to Solution.

Halden,
It really sounds like you have a resource conflict. That occurs when two programs or parts of programs try to use the same device or port at the same time. Your Get Device Function probably tries to open a session with each port (as you increment the index). When it hits a port which is being used by the other driver, it cannot open the session and stops working? Have you examined the errors returned by each program? The VISA drivers will return an error when the port is in use. I do not know about your program or drivers, but I would expect some kind of error. Automatic error handling in LabVIEW will not catch errors from a driver if it does not translate them to LV error clusters. So do not count on automatic error handling, if you use it, to display all possible errors.
Lynn

Using VISA and RS232 devise , loosing the COM port .

Using VISA and R232 devise communicating fine with labview and I can Read and Write.
however, I want to turn OFF the devise, then turn it ON again (part of the test), and be able to continue .
The COM port is not communicating . unless I turn both the devise off and Exit LV then restart again.
How to do that without restarting LV.
thanks

" Is there a better way to make sure its closed and driver is not hanging onto the connection? "
you could try a command like " devcon disable usb\vid_0CD5*0003~" and then "devcon enable usb\vid_0CD5*0003~"
( you will need to figure out the ID of your device, my example is for a LabJack U3. )
Get the devcon.exe-utility from microsoft.
but as mentioned before, just watch what happens with device Manager (' run devmgmt.msc')...
to enable/disable a device in a VBS script you can use below example, (As Administrator!)
Option explicit
Dim oShell
set oShell= Wscript.CreateObject("WScript.Shell")
oShell.Run "RunAs /user:Domain\USER ""cmd"
WScript.Sleep 100
oShell.Sendkeys "USERPASSW"
WScript.Sleep 500
oShell.Sendkeys "devcon disable usb\vid_0CD5*0003~"
WScript.Sleep 1000
WScript.Sleep 100
oShell.Sendkeys "devcon enable usb\vid_0CD5*0003~"
WScript.Sleep 1000
oShell.Sendkeys "exit~"
Wscript.Quit
My reason for doing it this way is that my USB device didn't respond to any of my calls from Labview. Enable/Disable solved the issue...
The thing I particularly hate about above VBS-script is that I need to send the Admin password in plain text...

Can the Com port on the EX90 be connecting to an AMX NI700 to receive command?

if so, what are the pinouts for the EX90? (TX/RX/GND) The AMX uses pin 3 for TX, Pin 2 for RX and Pin 5 for GND. I have been using an RJ45 cable and trying to match pins but I am still not getting a TX signal. Also, does the COM port need to be enabled?

The EX90 is not really build to be controlled by an additional control system.
(in general thats a thing for the integrator prodcucts).
The Serial port is not a RS232 (+/-25 Volt), instead of their using TTL level.
So a direct connection without a proper cable might cause a hardware fault!
I think the serial port was on by default, but that might have changed on the current software versions, thats what works fine for me:
xconf // serial
*c xConfiguration SerialPort BaudRate: 38400
*c xConfiguration SerialPort LoginRequired: Off
*c xConfiguration SerialPort Mode: On
The serial port is also on the bottom of the device, its ok to use it if you need to
troubleshoot boot issues, but besides that not really usable.
Dont expect Cisco to do any support for this if you run in to strange behavior when
controling the system with a 3rd party control.
Btw, what I would strongly recommenced is to use the telnet/ssh cli or http(s) API.
could picture that this might work with the AMX700, so why even think of using a serial port, ...

HTML DB and Serial(COM) Port

Hi, everyone,
Is there any way that HTML DB can communicate with Serial Port (COM Port) directly? I searched the forum, and saw someone mentioned "Visual Baisc", "Javascript", "ActiveX", or "DLL". Could anyone give an example for it if you had successful experiences about it?
My problem is I'm working on a HTML DB project which will read data from barcode scanner. And request I have is the HTML DB can monintor the Serial Port and read the data from there if there is one. That means some programs need to be embedded in or called in HTML DB page. I known there are some commerial software developed for this purpose on the market, but I am wondering if it can be done by HTML DB itself?
Thank you. And Regards,
Ran

> Is there any way that HTML DB can communicate with Serial Port (COM Port)
directly?
There seems to be a misunderstanding or lack of understanding about what APEX/HTMLDB is ito client-server architecture.
APEX is a server side application. It resides entirely in Oracle as PL/SQL software. It is executed by Oracle server processes that are servicing requests from a web (i.e. Apache) server.
APEX does not "run" on the client. APEX streams, via the web server, data to the client browser. These MIME streams can be anything from HTML, XML, plain text (like CSV data), to images and so on.
The browser receives this data stream, and depending on the browser configuration, does something with it - e.g. it renders a HTML data stream, it starts Flash Player plugin for a Flash graph, etc.
The browser interacts with the client. With the user, the mouse, the keyboard, the printer and any other peripherals the client may have - like a barcode scanner.
Can HTMDBL use a COM port? The more correct question is, Can PL/SQL in the Oracle Server Process access the COM port of the Oracle Server Platform?. The answer to that is yes - it can be done.
But in the context of client interaction and the COM port being that of the client platform - no. PL/SQL is a server-side language. It does not execute on the client in the client browser.
It is important to understand the web client-server architecture - as it is a lot more complex and inflexible and slower than the "traditional" client-server architecture. It is stateless. It uses a very "primitive" client, the web browser. It is bound to W3C standards which is the lowest common denominator. Forget about smooth and slick client GUIs using and supporting the latest desktop GUIs standards and controls. Forget about easily interfacing with the client platform's file system and peripherals and so on.

When i hold down command and r at the same time after restarting it comes up with a

When i hold down command and r at the same time after restarting it comes up with a black screen and a lock symbol and a field bellow where you would input a password, i have tried ALL of my possible passwords including my password i use for the mac and it stil will not work! all that happens is the text i put in bellow erases itself after hiting enter or clicking the arrow.

I've tried my apple ID password and that doesn't work either . I don't recall seting a password for an encrypted disk either :/ if it was for an encrypted disk, would it be in keychain anywhere? if so how can i find it?
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I have 2 new computers and they don't have com ports, how to diag?

I have 2 new computers and they don't have com ports only lpt
and usb . what soft can i use for TIP connection . Or I need to buy
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Hello,
please review the following thread
ultra 10 remote access
I would recommend that you either get a PCMCIA card that provides a serial port, a USB-to-Serial converter or just "lent" a system with a serial port. Usually current notebooks aren't equipped with a serial port.
The TIP connection works only if the network is configured (after the operating system is loaded).
What type of system you are trying to diagnose ?
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FTDI virtual com port driver (VCP) and Labview 2009 - random connection loss

Hi,
I am using an FTDI chip to go from USB to serial communication (FTDI Driver: 2.06.00). It seems to work at first but then after some time the connection gets lost ("connection for the given session has been lost" or "I/O error"). This happens in MAX as well as the built executable of the program I am running. Latest VISA drivers are installed - 4.6. I have tried flushing the buffer before and after communication with both visa clear and visa buffer flush vis. The lost connection seems to happen randomly.
I have seen other threads about this issue but they never reach a resolution. One thing i notice is that there are two FTDI devices in this system and only one fails, however when I unplug the working device the one that fails is able to connect again.
To sum up here are the system specs:
Windows XP SP3
FTDI 2.06.00 and older 2.04.02 drivers both fail.
2 FTDI devices on the system - they do get assigned different COM ports
Labview 2009 run-time
VISA 4.6 run-time
Thanks for any help.

We use Targus ACH63US Super Mini USB 2.0 4-Port Hub. It doesn't require external power but if you have a high power device you will have to plug the Targus hub into two usb ports on your pc (one provides power and the other does power and data transfer). They provide the usb Y cable to do this.

HyperTerminal sees a COM port but VISA does not

It should not be possible that HyperTerminal sees a COM port but VISA does not. Does anyone know why or have any ideas?
Here's some more info: I wrote a LabView (LV) program and deployed it (via the Application Builder) to some of our production department's PCs (some Windows XP and some Windows 7). We use it to set up products we design and manufacture through our device's USB serial port. The USB port is actually a virtual COM port (VCP) - a USB to Serial converter or "bridge". We have a custom driver for our device and since each device's USB bridge chip is programmed with a different serial number, every time we connect a new device to the PC the installer runs and assigns a new COM port number. This is so our customers can use multiple devices on a PC. Fine. On one of our production PC's we were close to COM900 ports (HyperTerminal sees only up to COM256) when suddenly Win7 would not allow any more. We were able to uninstall orphaned (non-present) COM ports from DeviceManager ("DM") by starting it from a command console (DOS window) with a special command-line switch, "set devmgr_show_nonpresent_devices=1" then "start devmgmt.msc" (I have this in a batch file). In DM View menu you can "Show hidden devices" and uninstall them as if they were connected. I've also tried uninstalling them the normal way when the device was actually connected. Either way, sometimes, not always, depending on the COM port number, after reusing that port number by installing a new device which picks up that old, freed-up number, LV VISA doesn't see it. In other words, when "Refresh" is clicked in the COM port VISA list box, any new devices installed should be and normally are seen. (Refresh is not needed if the application is started after the device's driver is installed. It is only need if the LV application is open with the new device is added.) However, HyperTerminal does see it and lists it in the Properties screen, the "Connect using..." list box. And the port works with HyperTerminal. (Of course we've tried rebooting after uninstalling and/or reinstalling the device, with the same results.)
When I've spoken to the NI Applications Engineers in the past about serial port issues (not about this problem) they have confirmed that if HyperTerminal can see the port then NI VISA should also see it. This is crazy. I am posting this in hope that someone can shed some light on this problem.
Thank you. -Ed

Good catch. Yes, we're using the Silicon Labs CP2102 and have created a "custom driver" installation package. Our new PCBs have a factory-programmed chip, so the PC reuses that COM port (COM3 on that PC). The problem is when we we re-program the CP2102 (setIDs exe) with our PID, and device strings (including the S/N), the PC runs our installer and assigns the next COM port number. I was hoping that maybe it would go up to 64K or something! Anyway, it surpassed COM256 but we ran into this problem when almost up to COM900.)
There is a registry entry for each SN device, which shows the assigned port. If we delete the key with regedit, the COM port database (don't know the file name) still has the port number. That's where Device Manager comes in. It seems to allow us to manually delete the ports, but it would take quite a while to delete 900. (I was trying to make a batch file for DevCon, but couldn't get it to see the HW ID of the devices in need of deletion.) So we tried manually deleting a few. After doing that Device Manager shows that Windows (and HyperTerminal) can reuse the port number when a new device (new SN) is installed, but, as you know from this post, VISA cannot see unless I manually add it in MAX.
I can't see how it has anything to do with the Silicon Labs driver. I might have to delete ALL of MY devices, then uninstall the driver files, reboot, then reinstall, as you suggested with the SiLabs driver. However, I don't see how VISA will now see these changes. VISA must have it's own database. That's what I thought deleting the ports in MAX would clear out, like a fresh install, but apparently not.
I've been through Silicon Labs' tech support on other issues and they've been able to help on some. I could run this by them.
BTW, have you noticed that Silicon Labs' chip and driver, while faster than NI's own "bridge" or serial-USB converter (I returned it because at $100 it's performance was worse than a $20 converter you can buy in Staples), is substantially slower than a real serial port? For example, our device can transmit 250 readings per second (a 12 byte string). A real serial port used with my LabView program can keep up, i.e.., graph & tabulate at that rate, but with a VCP we only get about 70 RPS. Same code. Can't figure this one out. They say the've tested the driver to 900 KB claimed. We're using 115KB here. Anyway, the VCP driver makes it look like a COM port which LV thinks it is. Why is it slower than a real port when the USB should be able to work almost 10 times faster than I'm using it (up to 1024 bytes per mSec per the full-speed USB spec, which SiLabs claims they verified)?
Anyway, I appreciate your help. Thanks! -Ed

Settings of Mail Host and Mail Port in transaction: SCOT for the node: SMTP

Hi,
Could anyone please explain me the significance of Mail Host and Mail Port for the SMTP node in transaction: SCOT.
It says Mail Server to which outbound mails can be passed.
Can i specify my GMAIL ID in the field Mail Host and left blank the Mail Port so that the mail can be sent to my GMAIL Account.
Please let me know if further details are required from my side.
Thanks & Regards,
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the below are the step to configure your mail server of anhy type ....
Steps to perform in SAP:
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a. Name: Internet Mail Gateway
b. Connection Type: T
c. Description: Internet Mail Gateway
d. Activation Type: Start
e. Explicit host:
i. Program: c:<dir>mlunxsnd (I used c:sapmail)
ii. Target Host: <Server_Name>
f. (MENU) Destination -> Gateway Options
i. Gateway Host: < Server_Name>
ii. Gateway Service: sapgw00
iii.<OK>
g. SAVE
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a. (MENU) Settings -> Default Domain
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3. Transaction SCOT Setup of the Node for queuing the emails before transfer to Exchange
a. Click on INT -> Create button
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c. Give Description
d. Assign the RFC Destination previously created (Internet Mail Gateway)
e. Node: Internet
f. Address area: *
g. Supported address Types:
i. All formats except the fllw
ii. ALI, OBJ, OTF, SCR, URL
h. Choose Ok and Save
4. Transaction SCOT Setup a job to execute the send process on the queue.
a. (MENU) View -> Jobs
i. Select the Create Button
ii. Job Name: SAPConnect
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a. Select users who require the ability to email from SAP
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Steps to perform on the SAP system (operating System):
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a. Create directory c:sapmail (Directory can be anything)
b. Unpack the ML*.CAR file from SAPs website
c. Alternatively, copy the ML* files from /usr/sap/../run/ directory. This ensures version compatibility with your SAP instance.
2. Create the directories for your sendmail program
a. http://emailrelay.sourceforge.net/
i. Download the emailrelay program
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i. Unpack the contents of the emailrelay zip into this directory
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i. http://www.tacktech.com/display.cfm?ttid=197
1. www.tacktech.com had some great instructions for creating a service on the NT side. (Thank you Tacktech)
2. Use SRVANY to create the services, as documented below.
d. Open command prompt
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ii. execute c:reskitinstsrv.exe "<SERVICE_NAME_Engine>" c:reskitsrvany.exe
1. This service is the engine
iii. execute c:reskitinstsrv.exe "<SERVICE_NAME_Send_Process>" c:reskitsrvany.exe
1. This service is the send process
iv. Modify the registry to represent the two new services
v. View instructions for Parameters and Application Creation under the services in the registry
vi. Command lines should be as follows:
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vii. Start the services using service mgr.
f. cmd prompt cd sapmail
g. mlsomadm c:sapmailmailgw.ini (see below)
3. Create a mailgw.ini file (This file is used by the mlunxsnd program)
a. Open a command prompt
b. Change to the directory c:sapmail
c. Run command mlsomadm c:sapmailmailgw.ini
i. This creates the parameter file for the send process.
d. MAILGW.INI entries
i. System Name: [SID]
ii. Client: [000]
iii. Username: [MAILADM] no user required, as this is not being used for your connection
iv. Password: [*******] leave empty
v. Language: [E]
vi. Load Balancing: [N]
vii. Hostname: [app_server_name]
viii. System Number: [00]
ix. Gateway Hostname: [ ] you do not have to specify, it will use the default
x. Gateway Service: [ ] default will be used
xi. Use SAP Router: [N]
xii. Set Bcc Flag on Env..: [N]
xiii. Trace Level <In..>: 1
xiv. Trace file <In..> c:sapmailtracein.txt - Can be where ever you want
xv. Sendmail Command: c:winntspoolemailrelaysubmit -from <SENDER_ADDRESS>
xvi. A warning may come up that says to not use the t flag. IGNORE
xvii. Codepage: [ISO-8859-1]
xviii. Generate Notificat..: [N]
xix. Trace Level <Out..: [1]
xx. Trace File <Out..>: c:sapmailtraceout.txt - Can be where ever you want
xxi. Update File c:sapmailmailgw.ini [Y]
Steps to perform on the Microsoft Exchange System
1. Allow the SAP systems to enter on port 25 to send mails using Microsoft Exchange (SMTP Communication)
reward points ....
Girish

Unable to configure Reporting Services 2012 after using 'netsh http delete urlacl' command and .EXE file also.

One of my servers quit responding during some troubleshooting of another issue and when I try
to reconfigure it I am receiving Results as follows:
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The URL has already been reserved.
It appears to me that there is something with the Virtual Directory that is not allowing me to use it or
overwrite it. If I change the name or the port the new configuration works fine, however this is part of a scale-out test environment and I need to keep the virutal directory names the same.
I have uninstalled and reinstalled SSRS in an attempt to resolve, but that did nothing to this issue.
I have used 'netsh http delete urlacl' command and deleted saved urls also but still am facing issue.
How can I manually list, delete, or edit Virtual Directories in SSRS 2012?

Hi Syed,
Based on my research, the issue can be caused by the default values for Report Server Web Service and Report Manager has already been reserved. In order to trouble shoot this issue, please refer to the following steps:
To check this issue, we can run the following command in the command windows:
netsh http show urlacl | find "Report"
It should returns the reserved URL as below:
Reserved URL :
http://+:80/ReportServer/
User:
Reserved URL :
http://+:80/Reports/
User:
Then we can delete the reserved URLs with the command below and recreate them to fix this issue:
netsh http delete urlacl http://+:80/ReportServer/
netsh http delete urlacl http://+:80/Reports/
Reference:
http://fix.lazyjeff.com/2011/12/sql-server-2008-r2-report-server-web.html
Hope this helps.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support

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