Problems with write to measurement file

My VI doesn't seem to write my signal properly when writing is enables.. however, if i change the "Write to measurement file" Express VI to a Write to Spreadsheet function, the signal is written correctly. From what I understand in previous discussions, there is a bug associated with enabling a write to measurement file, so is there a way to enable write to spreadsheet instead of using the express VI or is there a way I can bypass this bug?
Thanks,
TFlax
Attachments:
Analog test and collection.vi ‏700 KB

This is my second program ever written, first in matlab, so I am very new to the field. So why I choose one way over another I have no reasoning, all I know is that it works. I am collecting electromyography analog signals, with a range of +/-5V.. the "bad" writing with write to meas file is that I am getting a flat signal (range between -.01 to +0.01, give or take).. where when written with write to spreadsheet, the signal has proper voltage range and normal frquency and amplitude characteristics seen in EMGs.
I tried using a case structure for the write to spreadsheet, however it only writes the buffer size during continuous sampling. I need it to write the entire time the boolean (enable button) is true, also the enable button is operated as switch when pressed.
The discussion about the write to measurement file: http://forums.ni.com/ni/board/message?board.id=170&message.id=454380
Thanks again

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Hi
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writetest.vi ‏32 KB

astroboy wrote:
Hi Dennis, writing key updates or add lines, but the problem is that it also causes all lines to be clumped together, making it unreadable.
What's the better way?
Clement
I was complaining about the poor formatting of the .ini files myself a couple years ago in this thread. http://forums.ni.com/ni/board/message?board.id=170&message.id=273552
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Message Edited by Ravens Fan on 09-17-2009 10:29 PM

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Problems with multiple idocs in one file ( Inbound file )

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>
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>> When using Nero Showtime as a default program, the
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>
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Problem with Write To Measurement File Express VI not writing to file if file was deleted after the first call (7.1)

I'm using the Express Write to LabVIEW Measurement File in LV7.1.
I have it set to "Save to one file" and have tried both "Overwrite file" and "Using next available file name" for the "If a file already exists" conditions.
The path/filename is passed into the function.
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Ok, I've edited the VI you posted to reproduce my error (this time with 8.0).
I added a "master stop" and "start log" button. To demonstrate my problem:
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Dave
Attachments:
Write LV Meas File 2.vi ‏96 KB

Data format problem with Write to Spreedsheet File

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Hi powerplay,
another solution may be to convert column-wise using "number to fractional string", then interleaving resulting arrays and again using "array to spreadsheet string" (with "space" as separator).
Many ways lead to Rome
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Problem with importing saved .json backup file in fresh installed firefox 3.6.8? Message "unable to process the backup file", when i choosed option "Restore" from menu "organize your bookmarks" !?

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Improving Write to Measurement File Rate

Hello again everyone,
I was wondering if I could once again get some help with my VI which is dealing with data aquisiton, display and logging. I'm attempting to display and record all the data that is incoming serially from some external ADC boards. The data is received at 500Hz and I am trying to currently record this through the use of Write to Measurement file, however i'm finding that I am not recording all the data that is captured into the file. When I tested this code I found I was only getting a recorded sample rate of about 3Hz... I'm looking to reach at least recording the data at 50Hz minimum, however i'm having trouble figuring out how.
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Stirling
Attachments:
Serial read v2.2.vi ‏136 KB

Hi Stirling,
I don’t think it’s a problem with the Write to Measurement
File.vi. You need to have a look at the VISA Read.vi. You are reading 5K at
every iteration of the loop and that could probably be causing the delay. A
great way to troubleshoot this would be to turn on highlight execution.
Also, you should consider using the Array to Cluster.vi and
the Convert to Dynamic Data.vi in the Write to Measurement File.vi block. This
shouldn’t effect anything; just a suggestion to take advantage of LabVIEW functions.
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies

Write to measurement file help

Hi,
I am a beginner. I am working on a VI.
But have some problems that I couldn't solve.
Here is the VI attached, I get on the output the positive and negative peak values which I then write to a mesurement file.
But now I just get my last values of positive and negative peak in the measurement file.
But I there were different values before that last values also. I want to save all the values, or every time that values changes on postive and negative, I would like to save all values to a file.
Would be great if someone can help me with it.
Regards,
Raj
Attachments:
VI_HELP.vi ‏103 KB

If you did the TDMS file your self (not use the express VI). Then you could specify the group to write into and the channels. It sounds like you want to add new channels each time you acquire a set of samples. Look in the example finder (Help->Find Examples) for TDMS Write Triggered Data.vi. It looks like a decent example to get you started.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

System time in Write TO Measurement File

Hi, everyone. I'm Sorin.
I use a DAQ 6210 in Labview 8.2 to aquire some analog data at 1 sec,and i have 2 questions, please:
1. I need to record the data into a file .lvm, so i use "Write TO Measurement File" module with one column of time (X axe). But this time is relative, and i want to be system time instead. Is there any way to resolv that ?
2. Also, in my Waveform Chart i put absolute time because i couldn't find system time, though i need it. How can i change that ? Although, once i played with charts, and i succeeded to see system time, but now i can't. And i'm sure it wasn't complicate.

Hi Sir
I had similar problem. I tried to write to a measurement file with absolute time, instead of relative time here I got.
Also, I want the format to be sth like this 13/09/25 18:16:01.
Could you help me?
Thanks
LabVIEW Measurement
Writer_Version 2
Reader_Version 2
Separator Tab
Decimal_Separator .
Multi_Headings No
X_Columns Multi
Time_Pref Absolute
Operator FriedmanLab
Date 2013/09/25
Time 14:09:10.2151017189025878906
***End_of_Header***
Channels 1
Samples 1
Date 2013/09/25
Time 14:09:10.2151017189025878906
X_Dimension Time
X0 0.0000000000000000E+0
Delta_X 1.000000
***End_of_Header***
X_Value Untitled Comment
0.000000 21.787387 Enter a description
10.000572 21.847446 Enter a description
20.001144 21.841562 Enter a description
30.000716 21.908628 Enter a description
40.001288 21.902826 Enter a description
50.004860 21.963112 Enter a description
60.035434 21.967730 Enter a description
70.031005 21.968933 Enter a description
80.011576 22.039718 Enter a description
90.000148 22.065121 Enter a description
wei shen
Attachments:
Untitled.jpg ‏74 KB

Attach labels for write to measurement file and graphing

I am currently having alot of problems with attaching labels to double type of wires and changing the label attached to the dynamic type of wires. I want the write to measurement file to have the correct headings but the current headings for the columns are displaying untitled or change the heading for the dynamic type of wire. I attached a picture of the program and I would be very grateful if anybody knew how to change these headings.

Try this VI I made. It takes in a Double signal and a string, names your signal, and outputs it as a Dynamic Data.
I used this with the Write to Measurement File without any issues!!!
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Hope this helps,
Cheers
Attachments:
Name DBL Signal VI.png ‏59 KB
Name DBL Signal for Measurement File.vi ‏35 KB

Problems with write latency

Hi to all storage gurus,
One of our disk systems (HP EVA8000) has been quite busy lately. HP has
spent days analyzing the situation and the result of the analysis was
that the disk system is ok but there are occasionally up to 2000 ms
write latencies. According to them this is not out of ordinary and
operating systems should be able to handle the situation.
The problem is that Netware seems not always to be able to handle such
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but too often anyways. Netware is the only operating system which has
any problems with our EVA8000. In this particular EVA we we have roughly
200 hosts, out of which about 10% are Netware. Thus is seems rather
clear that something is wrong with our Netware setup or Netware itself,
we just dont have any clues what.
All servers have NW6.5 SP8, and HP supported Qlogic HBA's with latest HP
supported bios and drivers.
In our Startup.ncf we have:
set multi-path support=on
LOAD SCSIHD.CDM AEN TOFACTOR=5
LOAD QL2X00.HAM SLOT=201 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
/XRETRY=400 /XTIMEOUT=60 /BACKOFF
LOAD QL2X00.HAM SLOT=202 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
/XRETRY=400 /XTIMEOUT=60 /BACKOFF
The error messages are as follows:
18.06.2009 15.30.14 : COMN-3.27-34
Severity = 5 Locus = 2 Class = 6
NSS-2.70-5005: Volume KOTI12/USER2 user data write
(20204(zio.c[2301])) to block 122610663(file block 4810)(ZID
146302323) failed.
18.06.2009 15.30.15 : COMN-3.27-1092
Severity = 4 Locus = 3 Class = 0
NSS-3.00-5001: Pool KOTI12/SARKA is being deactivated.
An I/O error (20204(zio.c[2279])) at block 29505990(file block
104772)(ZID 3) has compromised pool integrity.
Any ideas what could be wrong?
Best regards,
Jonne Viljanen
University of Helsinki

Hi JJ,
Thanks for your insightful answer. We are using execution throttle 16 on
almost all hosts. However HP suggested to increase the execution
throttle on Netware hosts to 64, since their IO to disk system is very
small and thus increasing the value would not cause problems to other
hosts. Increasing the execution throttle did not solve our problems.
What value are you using for execution throttle?
Cheers,
JV
> Hi,
>
> We had some similar problems (many hosts on an EVA 8000) but only with a
> disk failure. A disk failure causes latency and thus resulting in node cast
> out, comatose services or dismounted volumes. And since a san is still is a
> shared disk system /EXECTHROTTLE might be something to look into. If a
> couple of hosts have the execution throttle set to high (like 256) then they
> will fil up the controllers queues first leaving no room for other hosts.
> We also we played around with the /XTIMEOUT parameter. but not as high as 60
> (ours is 8 on a 8 node cluster) because the cluster software also needs some
> time to make a good judgement.
>
> Cheers,
> JJ
> .
>
>
>
>
> "Jonne Viljanen" <jonne.viljanen@rmv_this.helsinki.fi> wrote in message
> news:[email protected]...
>> Hi to all storage gurus,
>>
>>
>> One of our disk systems (HP EVA8000) has been quite busy lately. HP has
>> spent days analyzing the situation and the result of the analysis was that
>> the disk system is ok but there are occasionally up to 2000 ms write
>> latencies. According to them this is not out of ordinary and operating
>> systems should be able to handle the situation.
>>
>> The problem is that Netware seems not always to be able to handle such
>> write latencies and the clustered services may go to comatose when the
>> write latency is so high. This does not happen on every such occasion, but
>> too often anyways. Netware is the only operating system which has any
>> problems with our EVA8000. In this particular EVA we we have roughly 200
>> hosts, out of which about 10% are Netware. Thus is seems rather clear that
>> something is wrong with our Netware setup or Netware itself, we just dont
>> have any clues what.
>>
>> All servers have NW6.5 SP8, and HP supported Qlogic HBA's with latest HP
>> supported bios and drivers.
>>
>> In our Startup.ncf we have:
>>
>> set multi-path support=on
>> LOAD SCSIHD.CDM AEN TOFACTOR=5
>> LOAD QL2X00.HAM SLOT=201 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
>> /XRETRY=400 /XTIMEOUT=60 /BACKOFF
>> LOAD QL2X00.HAM SLOT=202 /LUNS /ALLPATHS /PORTNAMES /MAXLUNS=12
>> /XRETRY=400 /XTIMEOUT=60 /BACKOFF
>>
>>
>> The error messages are as follows:
>>
>> 18.06.2009 15.30.14 : COMN-3.27-34
>> Severity = 5 Locus = 2 Class = 6
>> NSS-2.70-5005: Volume KOTI12/USER2 user data write
>> (20204(zio.c[2301])) to block 122610663(file block 4810)(ZID 146302323)
>> failed.
>>
>> 18.06.2009 15.30.15 : COMN-3.27-1092
>> Severity = 4 Locus = 3 Class = 0
>> NSS-3.00-5001: Pool KOTI12/SARKA is being deactivated.
>> An I/O error (20204(zio.c[2279])) at block 29505990(file block
>> 104772)(ZID 3) has compromised pool integrity.
>>
>>
>> Any ideas what could be wrong?
>>
>>
>> Best regards,
>>
>> Jonne Viljanen
>> University of Helsinki
>
>

Problems with write to measurement

My project group has some problems with the write to measurement VI.
Firstly, for each of the SOC/Voltage...each file only has one value, how to make all value inside one file?
Secondly,How to make all the different parameters, such as SOC1, SOC2, Voltage1, Voltage2, appear in one excel file for easier reference?
Attachments:
TwoBatteries.vi ‏246 KB

Look at your settings for the Write to Measurement File. You are telling it to save to one file, and then use next available filename. Try append to file.
Also, use Merge Signals to combine the 4 and write to a single Write to Measurement File. Right now you have 4 identical ones with the same file name. They are stepping all over each other.
When using the Write to Measurment File, try opening up the help file and reading it o understand what each setting does.

Problems with spaces in directory or file names and Word.exe

Hi
I'm trying to open a file with Word from my java aplication, and I have a problem with some file/directory names.
I have this
String cmd = "c:\\Program Files\\Microsoft Office\\Office10\\WINWORD.EXE" + " " + path;
try {
Runtime.getRuntime().exec(cmd);
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No, the exec method runs the Word.weird, it shouldn't, and it wouldn't on my system going by the test I just made, but I'm running linux & not windows, maybe the command line parsing is different for some reason.
The problem is that
Word starts and then Word says that it can't open the
file because the name or the path to the file is not
valid.You still should use the overload that takes a String array.

Problems with write to measuremen​t file

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