DSC stopped logging

I'm running Labview 7.1 and have up until very recently been successfully logging data using the DSC module. The is no obvious cause for this, hence the posting.
I have the DSC module installed on a PC with an RS-Linx OPC server. Many tags are configured and have been logging for over a year. The tagengine is configured and launched upon PC startup. Database is Citadel 5.
Basically, I cannot see any data beyond 8 aug 2007 when using MAX 4.1. I have tried stopping an restarting the DSCEngine. I also renamed the .SCF file and reloaded this into the tagengine. Also I have added a new tag to see if that would log. The tagmonitor shows all the tags are there and are updating. However, when I try to add the new tag to a view in max, it is not present. I'm at a bit of a loss to understand how MAX cannot see it, and suspect this is the root of my problem. Any help appreciated.
Mark

OK. I tried this. The read hisorical data .vi's behaved exactly like MAX, i.e. no data beyond a certain point. All the tags appeared to be there, etc.
I had a couple of other thoughts which I tried - also to no avail. I looked at the services which were running, thinking thte Citadel server may not be running. I found I had two services related to Citadel running. Starting and stopping these seemed to make no difference, although I did not reboot the PC, a it is running a pretty critical application - although it can be rebooted if absolutely necessary.
One thing: The Citadel service said it depended on something called NIPALK, which I did not see in the services list. Any thoughts on what this is?

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DSC not logging data

Hi all,
For some reason, my DSC has stopped logging data. I have a fairly simple setup (8 modbus servers) that are being read as I/O servers in the DSC. I have checked the "Log Data"option, and this was working for several months. Recently, I had to move to a different computer, and now nothing is being logged. The data are coming in correctly, the database seems to exist, but there's no new data being stored. I have tried creating a new database, and then going into "Project library: Properties" and poining it to the new database, but nothing seems to happen.
I'd welcome any suggestions.
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OAlab_pH_control.lvproj ‏9 KB

Hi Matthew,
There is no error message. In fact, I can access the shared variables just fine. The historical data charts act like they should, but they have no data. I've looked in the folder where the database lives, and see that it has basically never been used... there are 5 files (sdb_lock, pid_cdih, stridm.cdin, nodetree.elog, nodetree.elog.ckpt0) but nothing else.
I also did locate the original computer and found the technical report.
At this point, I'm reasonably comfortable abandoning any previous historical data, so I wouldn't object to a solution that involved starting the database over. I'd like to be able to use the original project to specify all the variables because it was laborious to set them all up.
thanks for your help.
mike
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ni_supportOLD.zip ‏311 KB

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import java.util.List;
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Hi,
I tried with below persistence.xml using toplink essentials but with oracle database and seems everything working as expected.
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Regards,
Vinay

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