LWAPP with AP and AC communicating over L3

When the Access Point (AP) and Access Controller (AC) communicate over an IP network (using UDP):
1- Is the MAC address of the AP's wireless clients known at some stage by the Access Controller?
2- I do not have a clear picture about DHCP (for wireless clients) in case the DHCP server is not at the AP itself.
- Is DHCP relayed onto LWAPP just as any other user data message?
- I assume the AC can work as a DHCP relay. Correct?

As per my understanding the above AP failover scenario you described applicable to "Local" mode APs.
In H-REAP, if WLC is not reachable it is going to "Standalone" mode without trying to fail-over to another controller. In that sense what you trying to achieve may not work.
Anyway I have not tested this sort of scenario, you are in a best place to give it a try & see. If that works let us know.
HTH
Rasika
*** Pls rate all useful responses ****

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How to copy a table with LONG and CLOB datatype over a dblink?

Hi All,
I need to copy a table from an external database into a local one. Note that this table has both LONG and CLOB datatypes included.
I have taken 2 approaches to do this:
1. Use the CREATE TABLE AS....
SQL> create table XXXX_TEST as select * from XXXX_INDV_DOCS@ext_db;
create table XXXX_TEST as select * from XXXX_INDV_DOCS@ext_db
ERROR at line 1:
ORA-00997: illegal use of LONG datatype
2. After reading some threads I tried to use the COPY command:
SQL> COPY FROM xxxx/pass@ext_db TO xxxx/pass@target_db REPLACE XXXX_INDV_DOCS USING SELECT * FROM XXXX_INDV_DOCS;
Array fetch/bind size is 15. (arraysize is 15)
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Maximum long size is 80. (long is 80)
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If my understanding is correct the 1st statement fails because there is a LONG datatype in XXXX_INDV_DOCS table and 2nd one fails because there is a CLOB datatype.
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Regards,
Pawel.

Hi Nicolas,
There is a reason I am not using export/import:
- I would like to have a one-script solution for this problem (meaning execute one script on one machine)
- I am not able to make an SSH connection from the target DB to the local one (although the otherway it works fine) which means I cannot copy the dump file from target server to local one.
- with export/import I need to have an SSH connection on the target DB in order to issue the exp command...
Therefore, I am looking for a solution (or a workaround) which will work over a DBLINK.
Regards,
Pawel.

RT and instrument communication over ethernet

We plant to use a Xantrex DC PS (interface info attached) and was wondering if we can use an ethernet hub in between the Host and the RT target and have all our stand-alone instruments connected to this hub. RT will communicate with these instruments over VISA. Hope nothing is wrong with this picture and it's doable.
Attachments:
Xantrex ethernet brochure.pdf ‏513 KB

Hi Pavan,
What exactly are you looking for? In other words, what do you think it could go wrong? The reason I am asking is that there might be several KBs or few, depending on what you are looking for. Now, NI-VISA shouldn't have any problem because it is a protocol that is used to communicate with instruments that are in a bus, like the GPIB bus or Ethernet bus, so I don't understand what could be the problem. If you have something in mind, let me know so we can discuss it.
Ricardo S.
National Instruments.

Preventing data corruption with TM and a TC over a wireless connection?

Long story short: I was using TM and a TC via wireless connection to do the usual ~/ backups. My last "manual" backup to a USB hard drive was on June 1.
I decided to wipe the partition to remove a lot of built-up garbage, etc., and reinstall Snow Leopard -- which I did, followed by the 10.6.4 combo update, the usual other patches, and the like. Still reinstalling a thing or two. But when I tried to use Time Machine to restore the things I wanted to keep (about 100 GB of data in all), it was sporadically corrupted and useless. Handfuls of MP3 files that wouldn't play, a good number of PDFs that wouldn't open and were unrecognizable in Preview.app, that sort of thing.
I went back to the June 1 data set and have noticed no issues thus far, but that also means that everything new from June 1 to mid-July was lost.
I would like to still be able to use TM+TC wirelessly, but have it be reliable, so what I'm wondering is this: how can I ensure data integrity when wirelessly backing up my home directory? What can I do to make sure corruption issues like this don't happen again?
I guess the obvious one is to not stop backups in progress by closing the lid or such a thing, but... what else?
Thanks.

I would like to still be able to use TM+TC wirelessly, but have it be reliable, so what I'm wondering is this: how can I ensure data integrity when wirelessly backing up my home directory? What can I do to make sure corruption issues like this don't happen again?
I don't mean to be negative here, it's just that with so many wireless interference issues with other networks, cordless phones, security systems, other nearby electronics, etc...the list goes on....I find that it is getting difficult to use the words "wireless" and "reliable" in the same sentence.
If you consider that a business, with important files to back up constantly, would never consider the use of wireless for this function, it might help place things in perspective.
If you are using Time Machine, I think it goes without saying that your first master backup should be using ethernet because the entire computer is being backed up on this pass. Not only will the backup proceed much more quickly, but it will be much more reliable as well. There are no wireless interference issues when you use ethernet.
If you don't need to backup each hour, as Time Machine does, you might want to look at Time Machine Editor to allow you to setup a backup schedule whenever you like. Maybe once a day at 2 or 3 AM when things around the neighborhood on wireless systems have quieted down and the cordless phones are not in use. Or, if you are on the computer quite a bit, maybe twice or three times day. This will minimize the chances of a corrupted backup due to wireless interference.
And a good wireless connection is a must. The "bars" at the top of your computer screen are there basically for show and they tell you nothing about damaging noise that may be present on your network. Post back if you want more info on evaluating your wireless signal quality, which is a combination of the best signal with the lowest noise.
I guess the bottom line is this...the more you can use ethernet (maybe think of your important data as if it were your business files), the better things will be.
Message was edited by: Bob Timmons

InDesign 2014 Installion with Settings and Prefs Moving Over From old CC

A while back I installed InDesign 2014 as it became available. However, as the installation process and updating my preferences were not at all seamless, I deleted all the InDesign files, or so I thought, and went back to InDesign CC. I again attempted to install InDesign 2014 using the Creative Cloud App and this time it only installed a Plug-ins and Utilities folder inside an InDesign 2014 folder, no App and no other support files.
Please advice as how I can install InDesign 2014 using the Creative Cloud App, so it knows that it was installed, and move all my settings and Preference over to the new InDesign 2014?
Any assistance and help will be greatly appreciated.

It sounds like you never UNINSTALLED InDesign CC 2014. You can do this by going to your Applications folder, opening the InDesign CC 2014 folder and running the Uninstaller. Then reinstall from the Creative Cloud desktop app.

Using Logic 9 with mixer and audio line in on Mac Book Pro.

Hello, I Just began studio recording, and am making the switch from garage band to logic 9.
I do not know how to make my instruments play through logic 9 using a mixer and a Line In connection to the mac like I could with garage band.
Please scroll down to the bold underline text for tl;dr
I am self taught, and never thought I would love working with sound, and I spent over a year touring the US doing live sound for concerts and am now helping out with live studio recordings, and projects on my own.
It started as something to do to fight boredom and to help, basically making sure nobody touched the mixer or to unplug it if things caught on fire.
By the end of the year I had been helping "Others" with live sound, and I learned a lot about the features and trims on the analog mixer that are more complex than "mixing the volume of each track" lol.
So please be patient with me. I do not know many of the terms, I just "feel" when something is not right and know where to go to in order to fix it or make it better, I dont have much practice when it comes to the technical side with computers and sound.
so I will try my best to understand your help.
Anyway's, I looked up online, and I cannot figure out how to get logic 9 to playback instruments set up on my mixer.
I currently have Male L/R 1/4inch to 8th Inch cables coming from main into the Line In port on the mac.
I know this setup is called "stereo" (I think?) and Im limited with only two separate tracks to record, so I have my selected tracks panned right and left for two separate inputs on the program.
I know everything works because I had it all setup on garage band, I changed nothing for logic, but all I can find are MIDI tutorials and I am using analog to line in, not MIDI.
Please let me know what I have to do to bring up two separate tracks, and also be able to hear them wile I play before recording.

Kudos to figuring it out yourself.
Yes, Logic is geared to the professional user, you will need to set up the program to your particular way of working, Logic was well developed for professional use long before Apple purchased it, it's not an Apple program per se. It's complex and offers a myriad number of choices so that it can be configured to many styles of working, there's often 3 or 4 ways to perform the same function.
Logic insists the user educate themselves... which is a good thing.
Here ya go!
http://documentation.apple.com/en/logicpro/
"Exploring Logic Pro" is a good one to start with.
Also in the main manual... "Setting Up Your System"

GPIB and RS232 communication problems

I've been having several "interesting" problems with GPIB and RS232 communications in LabVIEW VIs. Some I'll mention at the end for curiosity, but right now I'm facing a rather big problem. I'm essentially self-taught at doing LabVIEW (using 8.5.1 right now), but by now I've had a lot of experience as their either has not been any drivers or pre-made VIs for the instruments I've needed or I've not been able to get the available drivers to work and had to write my own anyway (such as with the HP 3458A), but nothing seems to be working right now. I'm not at work, but we typically find forum sites blocked anyway (I can't even download the NI drivers at work since they house them on a ftp server, go figures) so I can't give the VI itself (it wouldn't be easy to get approval even if I could) so the best I can do right now is in words describe everything I've tried. I will be happy to post follow-ups of specific details if I can if they would be helpful.
I've been working on a routine to read data from an MKS 670 Signal Conditioner/Display with a MKS 274 Multiplexer with 3 connected MKS 690A Baratrons. Previously I've worked on programs using other older displays and the analog outputs which were being read by a DAQ card, but for a new project it was decided to try and just read the data directly. I first worked with a unit with just an RS232 Serial Port which I managed to get to work, but had so much problems with garbage readings and having to add checks and re-reads that by the end no matter what delays I added between each reading and how simplified the command routine down to just 2 sequences and the read that it took at least 10 seconds to get 1 reading from each channel.
Figuring maybe it was a limitation of the serial communications for these instruments I tried to re-work it for a unit with a GPIB port with which I'm actually much more familiar. The problem is that I cannot get anything at all from the unit through GPIB. Everything even the bare-bones built-in GPIB CLR function times out with no response from the instrument no matter how long I set the timeout limit and it also freezes the entire GPIB bus as well. It isn't a waiting issue as it freezes on the very first command. The GPIB initialization function seems to work (I typically find this to be unnecessary), but the instrument itself doesn't even respond with a status code. I've also tried just the basic GPIB write functions with even just passing the <cr> and <lf> characters as well. In Measurement and Automation Explorer most of the time the instrument won't even appear when doing search for instruments and when it does it shows as not responding to the *IDN? command (yes I've messed with the EOI, EOS, etc settings and I've even changed the GPIB address even though when it gets this far it confirms that I have the correct address) and even tried manually doing the *IDN?, *RST, and *CLR commands even with <cr> and <lf> characters which the manual for these units clearly states are compatible commands and NI SPY and everything show no response at all. I've tried 2 different GPIB units, 3 different computers including several that are not online and haven't been updated for a while, and using older LabVIEW versions, extensive re-booting and resetting of computers and devices and still nothing. I'm using an NI GPIB-USB-HS GPIB to USB adaptor which I've used extensively on other systems and even re-connected to those systems and everything worked fine. When I hooked up equipment that I knew was working, it would either freeze the entire GPIB bus until well past whatever timeout setting I set at which point all the instruments would appear, but none responding to *IDN? queries or nothing would appear at all, or if I manually turned it off when frozen the other instruments would work and most even respond to the *IDN? queries. The same goes for both of the GPIB instruments of this type that I tried and again for different versions of LabVIEW, difference computers (all Windows XP though), and every GPIB configuration setting I can find to mess with in every combination.
Any thoughts or suggestions would be greatly appreciated. I've had all sorts of weird problems with equipment and LabVIEW (you've got to love undocumented design features) that have frustrated me before, but I've never had an instrument never respond at all especially a GPIB one. Getting garbage yes, no response at all, no.
The side side issues I'm just mentioning as they may be related, but I'm really interested in the above as I have working solutions for these:
One I've had is with a Hart Scientific (prior to being bought by Fluke) 1560 Black Stack that would continually stop responding to GPIB commands when on a continual read function taking readings just every 4 seconds with 250ms between each GPIB read or write command but for up to hours in total and the times it stops responding are random as far as I can tell. I even started sending the *RST command before and after every read or write command and still it freezes. The only thing is to manually turn it off and then back on or manually go through the menus and manually trigger the GPIB reset routine at which point it immediately starts responding. However, when I got sick of having to babysit it and just decided to try the RS232 serial port (as that is all it has without the extended communications module) it works fine no problem and I can even get readings slightly faster from it. Using a Hart Scientific 1529 Chub-e it could give me data on all 4 channels every second without problems. I just find it a bit odd.
When I couldn't get any of the HP 3458A driver packs to work to even give a single measurement reading and just made my own using basic GPIB read/write commands using the programming manual I still have a few interesting problems in randomly when reading off the full possible 256 bytes on the bus and clearing the bus I often find garbage partial readings on the bus every now and then. I've added a few routines to do some basic checks, but it is annoying. What is really weird is when just doing basic DC Voltage reads the "-" sign will randomly be dropped from some readings (started as about 1 out of every 5, down now to about 1 out of every 10). Fortunately I'm taking several readings and averaging and taking the standard deviation with limits on the deviations and basically added a routine to say if there is even 1 negative number take the absolute value of all then make all negative, but again I find it weird.
Thanks.
-Leif
Leif King
Metrology Engineer
Oak Ridge Metrology Center

Greetings Leif,
I understand you have completed extensive troubleshooting techniques to pin-point the problem with the GPIB communication. To begin, I want to ask you a few questions to help me understand your set-up and the issue at hand.
1) Is the NI GPIB-USB-HS cable the one which cannot communicate with your instrument?
2) When using the GPIB-USB-HS, does the GPIB interface show up in MAX?
3) If yes, does the instrument appear in MAX after scanning for instruments (from what I understand in your issue, it does so in an intermittent manner..)?
4) What driver version of VISA do you have installed in your computer?
5) Are you able to communicate to the same instrument using another GPIB cable?
Thank you for trying out some of these steps again, but we want to make sure we rule out other aspects in the systems which might be affecting the GPIB communication.
As for your other issues, please post seperate threads for each so we can help you accordingly. Thanks!
Sincerely,
Aldo
Aldo A
Applications Engineer
National Instruments

HTTP and JDBC communication

I have to develop a scenario with HTTP and JDBC communication. Please let me know if there are any tutorials available on it.

Dear Rana,
jdbc sender(theory)
/people/saravanakumar.kuppusamy2/blog/2005/01/19/rdbms-system-integration-using-xi-30-jdbc-senderreceiver-adapter
JDBC receiver
/people/bhavesh.kantilal/blog/2006/07/03/jdbc-receiver-adapter--synchronous-select-150-step-by-step
/people/sap.user72/blog/2005/06/01/file-to-jdbc-adapter-using-sap-xi-30 - File to JDBC
How to use SELECT statement in JDBC scenario's.
Ref : https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/1725 [original link is broken] [original link is broken] [original link is broken] [original link is broken]
stored procedures
/people/siva.maranani/blog/2005/05/21/jdbc-stored-procedures by siva
1278 by sriram
Sender adapter
/people/yining.mao/blog/2006/09/13/tips-and-tutorial-for-sender-jdbc-adapter
and also ref jdbc adapter in sap xi help.
Best Regards,
Srikanth
Reward the useful answers and you will get one point yourself

Process Failure when communicating over MODBUS using LabVIEW 2011 and DSC

I'm currently trying to read from a PLC's holding registers using MODBUS/TCP. I've confirmed that the PLC is updating the values and responding to MODBUS communication correctly using a third party program called Modbus Poll. However, when I try to poll the PLC using LabVIEW's shared variable engine, I am unable to read any values from the same addresses that I'm viewing with Modbus Poll.
My setup simply consists of a PC connected directly to the PLC over Ethernet, with no router in between. I am using LabVIEW 2011 SP1 with the DSC module.
I opened the NI Distributed Systems Manager to view the status of all shared variables in the Modbus library that I created and I've noticed that the CommFail bit is permanently set to "true". All other variables with a "read" access mode report "Process Failure". I've tried restarting the process as well as stopping and starting the local variable engine with no success. I've also restarted my computer several times to see if any services were failing, but this does not seem to have fixed the problem.
I finally resorted to monitoring communications over the network card that I have the PLC plugged into via Ethernet using Wireshark and I've found that while Modbus Poll is communicating with the PLC, many MODBUS and TCP packets are sent and received. However, when solely using LabVIEW or the NI DSM to communicate with the PLC, there does not appear to be any communication over the network card.
Something that may be worth noting is that I was able to communicate with the PLC and read values from it with the DSM on just one occasion, when I first figured out which addresses I should be reading from. It all stopped working shortly thereafter. Prior to this, "CommFail" was not usually set to "true" with my current configuration. Thinking that it was my firewall, I have since turned my firewall off, but this seems to have had no effect on the problem either.
Any help on this matter would be appreciated.
Solved!
Go to Solution.

Just a thought but I think the register addresses used by LabVIEW are one off of the actual register #. I was using a CRIO as a modbus IO Server and had to shift the register addresses by 1 to get things to work correctly (can;t recall if it was +1 or -1). This is documented somewhere on ni.com but can;t seem to find it now. But here is another link that may help:
http://zone.ni.com/reference/en-XX/help/371618E-01/lvmve/dsc_modbus_using/
Dan

I have my contacts synced with icloud and exchange. I want all of them to be synced via icloud, I have tried turning contacts off and then clicking merge but that doesn't copy all of them over. How do I transfer all contacts onto my phone and then icloud?

I have my contacts synced with icloud and exchange. I want all of them to be synced via icloud, I have tried turning contacts off and then clicking merge but that doesn't copy all of them over. How do I transfer all contacts onto my phone and then icloud?

Welcome to the Apple Community.
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Horrible playback issues with iTunes 8 and Airport Express over Wifi

Hello folks,
I just upgraded to iTunes 8, and since then, I've been unable to get good playback from my Airport Express with iTunes on my Macbook Pro.
I get between 5-30 seconds of continuous playback, then a hiccup, ad nauseum, ad inifintum. A five minute track usually ends up taking six-seven minutes to complete, and it's like listening to a CD skip.
Both the Macbook Pro and the Airport Express are communicating over 802.11n, and worked well before the upgrade to iTunes 8. On my older, slower, crappier Powerbook which only has 802.11g but runs iTunes 7 (in the same room, about two feet from the other laptop), playback is rock solid.
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My AirPort Express optical out has this problem as well, stutter and very bad sound. But only the new 802.11n modell. A older 802.11g model works without a problem.
It worked well until I upgraded to iTunes 8, I bought in in May.
I just had my AirPort Express 802.11n replaced under warranty by Apple but the new unit has the same problem.
Everyone who is using the optical out and have the stutter problem needs to write to Apple about it so they realize it's a problem and fix it.
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The software required for communicating with ipod and mobile phones was not installed correctly

ok i've seen this in several threads and haven't found one with an anwser. the software required for communicating with ipod and mobile phones was not installed correctly. of course when you tell it to repair it does not. this has happened several times now and only cure i have found is uninstalling itunes and reinstalling. works for maybe a few weeks then does the same thing and i start all over again with uninstall and reinstall. i tunes version 10.4.1.10 64 bit running on windows 7 64 bit and trying to sync with Iphone 3gs - so anyone have a fix for this or am i stuck reinstalling itunes every few weeks???

"The feature you are trying to use is on a network resource that is unavailable. Click OK to try again, or enter an alternative path to a folder containing the installation package "iTunes64msi"
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Problems with outlook and address book contacts: my outlook contacts had around 3,000 entries. Outlook duplicated by itself and now outlook and address book have each over 340,000. What should I do?

Problems with outlook and address book contacts: my outlook contacts had around 3,000 entries. Outlook duplicated entries and have now 340,000. I reinstalled microsoft office and, thus, outlook, and reinstalled mac OS X system and applications. While I managed to delete outlook contacts so that I can re-sync with my blackberry, the contacts at Mac Address Book were not deleted and still have over 340,000 entries. I do not mind deleting all contacts since I have back up, but I have not been able to delete them. Also, when I go at Address Book and try to delete or merge duplicated entries, the system takes forever and never ends because of such large amount of entries. Worse, when I do so I run out of RAM memory.
My Macbook pro is just 2 months old.
What should I do? Is there a way to delete my Mac Address Book without having the problem above?
Many thanks
Regis

zlatan24 wrote:
For solving out troubles connected with corrupted or lost address book you may use address book recovery. It owns various features such as restoring wab files, it working under any Windows OS. The utility has modern and easy to use interface due to almost every experienced users.
If it is a windows problem it's not going to run on the OP's MacBook Pro

Why is it when i update my status on facebook from iohone it splits the updates into two differents boxes with some funky symbol. I have uninstall facebook and installed it over and it still does it. only the facebook IPHONE app.

why is it when i update my status on facebook from iphone it splits the updates into two differents boxes with some funky symbols at the beginning.. I have uninstall facebook and installed it over and it still does it. only the facebook IPHONE app where it says to update staus text to FBOOK i have already update my phone too.
if i go on the facebook site and update there through a brower on iphone it will work fine just cant us IPHONE mobile upload, . But its a pain of not using my IPHONE APP for facebook cause it does that.

The warranty entitles you to complimentary phone support for the first 90 days of ownership.

LWAPP with AP and AC communicating over L3

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