Error Message 177

[Wickersheim]

Hello All,

I ‘am saving data in a TDMS file format.  When I try to open the file in excel, I get an error message.  An error box appears labeled "TDM Importer" with an error message of "USI encountered an exception:  (177): Error while initializing interface" inside the box.

In my VI I ‘am using the Write to Measurement File to create data files.  I have the measurement file set to start a new file every 10 Megabytes.  One set of data measurements is 3 files large.  I ‘am able to open the first two in excel but not the last one.  The write to measurement file also creates a .txt file with this message "ERROR: TDS Exception in Initialize: Tds Error: TdsErrAccessDenied(8):"

Any ideas why this is happening and how to fix it?

Thank you for your help,

                -Mike

[Anna_K.]

Hello Mike,

I have not seen this error before, but I can look into it. Could you write to an excel file as well as TDMS?

Anna K

[Steve__M.]

Hi,

Can you attach your VI please in question in order to reproduce your problem. Have you try to load your files with the TDM Add-In for Microsoft Excel available here ? Also you should take a look at this tutorial for the TDM add-in.

I hope it helps.

Regards,

[Wickersheim]

HI All,

     Thank you for replying.  I did find a work around for this problem, instead of using the Write to Measurement function.  I used the long method of TDMS Open, Write, and Close.  When I did this a few things happened that I can't explain.  The files are smaller, a lot smaller.  Instead of three files totaling 30 Megabytes, it's one file of  ~1.5 megabytes.  That's OK with me, the smaller the files the easier it is to move around and process the data.  When I opened the data file this morning, I was able to use the Add-In button within excel with no problems.  One thing that I 'am concerned about is the write function, it holds the data until the close function executes.  If I have an power outage, I might lose that data.  Not the end of the world, but would be nice to keep all the data taken. 

     I have attached two files.  Mike Battery Charger Version 3, is the write to measurement version.  Mike Battery Charger Version 4, is my work around.  I 'am not the best LabVIEW programmer, everything I know is pretty much from a book and a few people who knew enough to get me started.  If you have any tips and tricks I would like to hear them. 

     Here is a basic overview of the program. This VI is designed to charge and discharge batteries autonomous while taking readings every second.  I 'am interested in Temp (AD 590), Voltage (Voltage divider connected to a AI port, then software to correct the measurement), Current (40 Amp Hollow Effect Sensor), Watts (Software Calculation), and Watt hours (Software Calculation).  The battery box is 66 NiCad's in a parallel series configuration.  Charge time takes about 4 to 5 hours, depending on the load, the discharge can take anywhere from halve an hour to 12 hours.   

     In Version 3, if I complete just one charge and discharge cycle the files are fine.  If I let Version 3 run forever, the last file in the series becomes corrupted.  I 'am useing excel 2007 with the Add-in driver downloaded from NI.com

     Thank you,

      - Mike

[Anna_K.]

Hello Mike,

To be safe, we can insert a TDMS Flush Vi right after Write. This will flush all data from system memory.

Anna K.