Outputting a data point every second

I want to output a data point every second to an excel sheet. I got it so that it only outputs one accumlated data point. Each data point includes a timestamp, rate, and volume.
Attached is my VI.
Solved!
Go to Solution.
Attachments:
PumpDriver Test 4.vi ‏82 KB

Mike227 wrote:
Hey Ravens,
It never worked...the status isn't even updating which leads me to think that I am getting an error and not clearing it?
If you post the code, we might be able to help you figure it out. And errors happen for a reason. Are you actually getting an error? If so, what is the error?
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Similar Messages

Create data merged document with data on every second page?

Is it possible to create a data merged document with the variable data only on every second page?
I have set up the pages with the variable data as a master page (on every odd page) with the text box and paragraph style all set up, and I have set 'override master page items' so the data can be placed, but InDesign seems to freeze up when I try to create the merged document?

There should be no problem doing the merge with a two-page master and a two-page template document with fields only on one page (and off the top of my head there's no reason to move them off the master page if that's where you put them). I think the problem here is that rachrachm already has a file of 500 pages (based on another thread asking how to apply masters to every other page).
It's potentially possible to simply place the data file (without the header row) as a text file and auto-flow through the master page frames (can't say for sure without seeing the files), or if the pages without the merge fields are the same just, remove all but the first two pages from the template and do the merge.
As I metioned earlier, though, this is a very inefficient method of producing that sort of document. A true variable data print flow would be better (you'd need to find a commercial printer who can do it with your data file), or the home version would be to make one single page file for the static content, print 250 copies (plus a few extras, just in case), then make a single page merge template, do the merge, and print that on the back of the already printed pages, or as a separate page. It is immeasurably faster to print multiple copies of a document than it is to print a document that has multiple identical pages.

How to resample a waveforem sample every n data points

I would like to convert a waveform data set that has 1746 data points into a signal that has 500 data points by selecting the x-value from every 3.5 (1746/500) points and eliminating all other points. Ideally I would like to average the x-value of every 3.5 points and turn that into one data point in the resulting signal but I am not sure if that is actually possible. If at all possible I want to use the express VI's as I am not too familiar the other programming language. I have been unsuccessfully trying to use the Align and Resample express VI because it is supposed to re-sample a signal every n data points but for some reason isn't working. I have attached the data set (titled: Input) as well as a simplified program (titled: Resample Example). Please contact me if you require any further information.
Thanks HEAPS!
Attachments:
Attachments.zip ‏55 KB

I have a similar re-sampling issue and think I'm missing something here.
The attached vi reads two analogue voltage levels one is a noisy signal (from leg muscle activity EMG) the other is from a foot switch, which I am using to partition the EMG into blocks of data (strides). There may be up to ten blocks of data which I'm trying to average, but they first need to be re-sampled to get them the same size (such that they represent one complete gait cycle). I am currently saving the blocks to TDMS file (for my benefit) then opening the file and re-sampling by changing dt based on the data size. But it's not working. I've also tried using the express resample vi that is used in the examples here, but it outputs nothing.
Any ideas?
Note: Change the file extention of test.vi to .tdms. It is an example data set. .tdms isn't a valid extension for upload to the forum :-(
Attachments:
EMG using NI-6008.vi ‏133 KB
test.vi ‏772 KB

How to save one data point at every 10th cycle?

Hello,
I am using LabVIEW 5.1 and PCI-6023E. In my application, I need to detect peak values from a load cell and save the one data point that detected at every 10th cycle. Do you know any ideal way to do this? Mine always save data values the whole time that the condition is true which is about 26 values; not one value as I want. Any help would be greatly appriciated.
Hao

Hello Justin,
Thank you very much for helping me out. I did not state my question clearer last time. Actually, the cycle here is the number of life cycle of a valve that being tested; therefore, the iterator i can be any number when the valve's life cycle reaches its 1st, 11th, 21st....cycles. Do you know any other way to do this?
Thank you in advance
Hao

NaN as Output Data points

Dear friends,
i have written a resistivty program using ke224 current source, ke2182a nano voltmeter and lakeshore325 temperature controller,
the program is running fine, data points are being written to spreadsheet,
but the data point on x-axis is 0000 and on y axis is NaN,
also i am getting an error6 at LSC325,
can you friends please figure out wher i am stucked?
thnaks in adavance

My first suggestion would to break down the task into chunks and turn these chunks into subVIs. Try to make these tasks reusable if possible (ei used in multiple places). As it stands, I can't figure out what is happening in your VI.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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Graphing data of different data point amounts I get errors

I'm using Labview 7.1 and I'm graphing a group of data sets on a single graph display.
These data sets have different numbers of total points and the sets with a less number of points wind up going back to the origin (0,0).
This seems to be due to where they stop in data points labview fills in the vacancy with a 0,0.
The result is (other than addiing erroneous data points) is the scaling is way off because I'm not near the origin.
How can I( get round this problem?
Thank you,
Philip

Your code seems to be highly flawed. Does it even work at all?
Some comments.
If you load more than one data file, the data from the files read in the previous iteration gets lost. You'll only get the set that you read last. (for example, the 2D array output from case "=0" will be empty at all later iterations. That's why you get all these zeroes!
Why do you need to do all the array extraction and manipulation at every while loop iteration. Everything prior to the division by the FP control belongs outside the while loop.
"Array subset" is better than "delete from array".
The while loop spins at infinite rate calculating the same old stuff over and over again, millions of times/second. Use an event structure so it recalculates exactly once whenever the control changes.
All the Array manipulation is done identically in four different places, you only need that code once in a loop, you can even do it right in the FOR loop when you read the data.
The label.text properties need to be written exactly once, ouside the loop.
You don't need to connect an indicator to the slide. Just right-click on the slide and do "show..digital display".
You don't need a stacked sequence. It only hides code and forces backwards wires, making the code hard to debug.
You don't need to transpose following by gettting a row. Just get a column instead!
Attached is a quick attempt at some simplification according to my comments above. I cannot test it so it probably needs a few tweaks here and there. Still, it should give you some ideas. Modify as needed.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
Read_from_Text_File_chirpTemp_thingMOD.vi ‏192 KB

Report painter -output parameters,Data source,Extract parameter, report

Hi expert,
1)What report painter -output parameters,Data source,Extract parameter, report mean for and what are the difference?
2)I have create new report painter and transport to Test server using T-code:GCTR and I find that the T-code always point to old report. As I had check the SE93 the D_SREPOVARI-REPORT is point to report group.Why this happen?
3) Does creation of new report or modification of the report always need to select the extraction option so that it will able to display the relected changes? Because, I have done modification on the report but it is not reflected the changes even i save until i have to create the extraction is able to display the report but every time i run the report need to select the extraction with option to choose new extract or old. Kindly advice how to save and create the report painter and save will display reflected result .
Please help

Hi BR Christian,
Thank you for the prompt reply.
I have few querys as below:
1)Do we every time create new report by copying the existing report painter need to select output parameter, data source and extract parameter in order to be able to display the new report?
2)when modify existing report painter and save it do we need to select output parameter, data source and extract parameter in order to be able to display the modify report correctly?
3) What are the different between right click copy the report inreport painter compare with create report painter with copy GRR1?
4) What are the T-code for modify the report group?
5) When I create a new report with the right click copy in GRR1 and modify the report painter column only and everything remain the same just the report name different why when execute the report it always appear in the selection screen with report button which have option button to select the 2 version of report which one is the destination report that I copy from and one is the new report? How to set the report when execute will only display the new report only without need to select the option with just new report only?
6)For transferring reports you can use GR37 (export) and GR38 (import) can be use to transport from one client to another client? What is difference between GR37 compare with GCTR?
7) If I use GR37 and GR38 it is mean no need to create the transport request which as usual we create transport se10?
we can directly import to another client ussing GR38?
8)When we create a new report with copy with the existing report with just modify the report colunm and the report name difference only what are the setting example: report,report group need to be selected to be include to export/transport to another client?
9) What are the difference between library and report group?
10) Can we set Se93 to execute only report not report group? How?
11) when using GR37 to transport it is also include the report group,library and the particular report?
12) Can I include the variable in the column header to display fiscal year which I have selected from the selection screen?
How and which variable should i use?
please help.
many thanks
Edited by: KH on Jun 18, 2011 6:52 AM
Edited by: KH on Jun 18, 2011 6:55 AM
Edited by: KH on Jun 18, 2011 7:06 AM

Plotting an array with a large number of data points

Hello All,
I am collecting data every second for 24 Hrs. How do I plot this on a XY plot? I have the data collection setup in a while loop and my initial attempt was to use a shift register and a build array to make the array and that works OK. The problem is I do not know if this is a wise option in terms of memory usage. (I end up making 3 arrays and 3*86400=259200 data points in 3 shift registers).
What is the better way to plot 86400 data points in a XY plot? I am also writing the data to a file every second.
Thanks,
KB

Allan,
Thanks for the message. I am attaching with this message a ccpy of my vi where you can see that I am collecting data from 3 counters, writing them to a file and displaying them. Can you comment on this Vi with regard to memory management?
Yes, I would like to see your examples. Thanks once again.
KB
Attachments:
PC21.vi ‏418 KB

LabVIEW DSC Logging too Many Data Points for Integer Tags

Hi,
I am having a strange problem with LabVIEW 2013 SP1 DSC data logging, running on XP SP3.
All the integer Data Type Tags in my Tag Database that are set to data log, are logging way too much data. When I look at the amount of logged data points for these int16 in Historical view I see its logging a point nearly every second. See screen shots below or attached jpeg's of screen shots of trace view and Trace Props of one of the integer Tags. I would prefer the integer tags to only log on change like the boolean tags.
These tags are being acquired from a Horner OCS over Modbus Serial RTU. The Modbus comms is set-up to poll once a second.
The problematic Tag Data Type in DSC logging are Int16
The Modbus register data items denotations I am using for Int16 is S4#####
Example 'OCS_Modbus_Master\S403709'
The same register represented in OCS Register is shown as '%R0709'
The trace properties for some of these int16 tags is showing database page numbers in the thousands, which compared to the largest floating point tag is currently showing 172 pages after several months of logging.
I would have expected int16 tags to only log a value when the value changes and since the 'update deadband' tag setting is disabled for integer tag properties there is no way to config the tag to only log on changes. What is the default logging config for integers. Log everything or log on any change?
I would prefer for these integer tags to only log on change, since they change infrequently, log on change would be much more data efficient.
I tried changing the tag data type to floating point and gave it an update deadband value to try and see if that would reduce the amount of logged data, it didn't seem to make any difference.
Not sure if the issue lies in the
> Modbus Comms
> The DSC data event tracking module
> The DSC Data Logging module
> Some kind of Horner OSC data type mismatch which results in DSC polling seeing the acquired value as having changed on every poll.
Any suggestions greatly appreciated
Thanks
Paul
Attachments:
Integer Tag Data Points Trace View.jpg ‏125 KB
Integer Tags Data Points Tag Properties.jpg ‏42 KB

This definitely sounds like a citadel/logos issue. There are two possibilities:
1) corrupt database
2) corrupt logos
To see if it is a corrupt database, simply go to your database folder and move all the files out of that folder to a different folder. Then restart the application. Your application will create a clean database. This may solve the problem. If so, then you know it is a corrupt database.
To upgrade/reinstall logos, go to the Control Panel -> Add/Remove Programs. If you see logos there, uninstall it. After uninstalling it, install the most recent logos version (found at ftp://ftp.ni.com/support/lookout/logos).
Please let me know if the problem persists. As you know, you may also always call in to the Tech Support Line.
Thanks.

Propagate data point to multiple consumers? I'm probably overcomplicating this.

Please see the attached screencap.
The DAQ assistant in the first case structure is taking a lot of measurements from a local cDAQ chassis. One of those data points (#15) needs to be extracted (hence the select signals) and then merged with the signals from three remote (ethernet connected) chassis.
The issue that I'm having is that the data point, due to the fact that the chassis and consumers aren't running in any specific order or sync, sometimes just isn't there when the consumer loops run and it reads a 0 rather than the value. This causes the test stand to think it lost hydraulic pressure and call for a shutdown.
I'm aware someone will tell me to wire the error from each DAQ assistant to the next, but that creates a massive 6.5 second loop time, which is unacceptable. The chassis have to remain independent to keep execution time down.
I'm looking for a way to 'catch' that #15 data point and hold it for the consumers to use until the next iteration where it is replaced with the new value. I'm not sure if Collector is what I'm looking for, or some sort of data copy, or a register. If this was a PLC I'd know what to do with it.
Thanks in advance.
Still confused after 8 years.
Solved!
Go to Solution.
Attachments:
lostpoints.jpg ‏246 KB

As I see you are using LV in a wrong way. Why don't you run the DAQ tasks in independent while loops? You could use the same Queue, and you can add time stamps to every data package (or also a label to show the source) created in the several Producer loops. In your single Consumer loop you can just decide what to do with the data depending on the label (save to File,etc...).
Other big problem: do not use DAQ Assistant! It is OK for quick testing, but not for real application! These Express VIs initializes and closes your hardware at EVERY while loop iteration.
You should use proper DAQmx VIs: initialize your HW resources BEFORE the while loop, do your DAQ inside the loop, and close HW components when you stop the application.
There are many examples shipped with LabVIEW, have a look how to use DAQmx VIs. Also, this way you avoid the silly dynamic data wires...Much easier to live with Double arrays

How to read two files (one is updating every second, the other is constant) simoltaneously

Dear All,
I will appreciate if somebody help me.
I want to read two files, one is temperature wich is updating every second, and the other is hysteresis energy which has specific rows and is constant.
I got a program in discussion forum which read a file as it is updating. I checked this program in my case and it works.
Then I added reading hysteresis energy file to the existing file. But while i am running the program, the hysteresis energy file is read with all rows.
But the aim is that everytime which temperature updates, I need to read just one row of the hysteresis energy file.
so, in this way in every second i have a new temperature data and one row of the other file.
I tried to used "for loop" inside the program, but it did not work, becuase reading temperature will be stopped untill for loop ends.
I attached the program.
Could somebody help me how to read just one row of hysteresis energy file everytime temperature updates?
Solved!
Go to Solution.
Attachments:
Readfiles.vi ‏23 KB

I do not understand relationship between your two files.
You have another VI or app that is writing data to both files and when new temperature data added you wish just to read the new data and then read one new line of the hysteresis file?????
But is one is constant, why do you need to keep reading it?
Anyway…
The “Read From Spreadsheet File.vi” preformed an Open and a Close for each time it is called (if you will open the VI up and drill down and you will see). So that resets the file pointer back to the beginning and there for will read in the whole file from the first to the last each time if you do not set the start of read offset or number of rows.
Now the Read from Binary File does not reset the file pointer and leaves the file pointer just past the last byte read so it will start with any new bytes automaicly only giving you the new data.
I do not think you need to do the math with the Previous EOF=0 and the File size to get what I think you are trying to do.
Plus use shift reg for the Data string instead of local var
Set the mechinacl action of the stop botton to Latched
So you do not need to init the two controls
Also, I do not get the End of file encountered error (4) from the Read from Binary file if I attempt to read past. It just returns and empty string.
Omar
Attachments:
Readfiles.vi ‏22 KB

Boolean indicator come on and stay on if only one data point outside of limits

Okay, here goes my second rookie question. My first one was solved in a matter of hours after posting here, so I am going to give it another shot. This has probably been posted elsewhere, but I just am not familiar enough with the terminology and know how to find it in this forum... sorry for that.
Currently, I have a setup where I am using an In Range and Coerce function in the Comparison Pallette to check the output of my source and compare it with a user inputted upper and lower limit. I have hooked up an LED indicator to the Index Array and then to the In Range output. Right now, if my data goes outside of the limit, the LED Indicator will light up, but it will immediately turn off if the data goes back within the limits. I want my LED indicator to come on and STAY on if even 1 data point goes outside of the limit. What can I connect between my LED Indicator and my In Range Comparison to make this happen?
Sorry for being so new to this!!

Hi Spsuengr,
I have attached a boolean toggle vi for you. You can insert this vi in between your led indicator and in range output. It will latch the output by default. You can use the latch(t) input to disable the latch feature (to perhaps reset).
Above is the boolean latch vi
Above is how you need to insert it into your code. If you leave the Latch(t) input unconnected it defaults to a latch output. Only wire a control to this if you want to either change the output so it follows the input or if you need to reset the output.
Rgs,
Lucither
Message Edited by Lucither on 04-15-2010 05:22 AM
"Everything should be made as simple as possible but no simpler"
Attachments:
Boolean Latch.vi ‏18 KB

Query for getting data for every quarter for financial year

Hi,
My problem is I need to get the data for every quarter for financial year and also I need data for every week for financial year.
For example for financial year 2012-13, Apr2012 to Jun2012 would be Q1, Jul2012 to Sep2012 would be Q2 and so on. Total 8quarters should come upto Apr2013.
In the same way 1st apr 2012 to 7th apr 2012 would be week1, 8th apr to 15th apr would be week2 and son on. How to write a query for this scenario in oracle. Can anybody help me on this. very urgent..
Thanks in advance.

lakmesri wrote:
Hi,
My problem is I need to get the data for every quarter for financial year and also I need data for every week for financial year.
For example for financial year 2012-13, Apr2012 to Jun2012 would be Q1, Jul2012 to Sep2012 would be Q2 and so on. Total 8quarters should come upto Apr2013.
In the same way 1st apr 2012 to 7th apr 2012 would be week1, 8th apr to 15th apr would be week2 and son on. How to write a query for this scenario in oracle. Can anybody help me on this. very urgent..
Thanks in advance.
How can you get 8 quarters within a year ? I'b be concerned here.
lakmesri wrote:
Hi,
In the same way 1st apr 2012 to 7th apr 2012 would be week1, 8th apr to 15th apr would be week2 and son on. How to write a query for this scenario in oracle. Can anybody help me on this. very urgent..
Thanks in advance.
First, that question is really not clearly asked. Second how could it be urgent ? You even did not tell us your Oracle version, did not show any tables descr, output sample nor any effort on your side to work on.
Nicolas.

REGEXP_REPLACE issue/bug - replaces only every second occurence

Hi All
I am using
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE     10.2.0.1.0     Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
I need a regular expression to rename a variable in a mathematical formula, when testing my code I discovered that if the variable was repeated right after itself only one occurence was replaced. I need to only replace whole words as some variables can be a subset of a longer variable name, and variable names can have underscores in them.
Below is an example of what happens.
Can someone please tell me why this happens? Example code is:
SELECT REGEXP_REPLACE('ab+ab+ab+ab+ab+ab+ab+abc+abc+ab', '(\W|^)ab(\W|$)' , '\1xy\2',1,0,'i') from DUAL;
The regular expression matches all 'ab' with a non alpha character or beginning line before and a non alpha or end of line at the end.
I then replace the 'ab' with 'xy' and keep the original non alpha on either side. What happens is that only every second occurence is replaced.
If I place a space after every '+' then it replaces all occurences. (Obviously this is a user field in a table of mathematical formulas so I cannot expect the user to worry about this problem.)
I believe it may be due to the fact the pointer in finding all occurence is moved incorrectly and it does not find the match immediately after.
Can someone please explain this? Or am I missing something in my example.
Thanks
Dudley

Is this what you require? I changed your query a bit.
SQL> SELECT REGEXP_REPLACE ('ab+ab+ab+ab+ab+ab+ab+abc+abc+ab',
2                         '(\W|^)ab(\W|$)',
3                         '\1xy\2',
4                         1,
5                         0,
6                         'i'
7                        )
8    FROM DUAL;
REGEXP_REPLACE('AB+AB+AB+AB+AB+
xy+ab+xy+ab+xy+ab+xy+abc+abc+xy
1 row selected.
SQL>
SQL> SELECT REGEXP_REPLACE ('ab+ab+ab+ab+ab+ab+ab+abc+abc+ab',
2                         '(ab)(\W|$)',
3                         'xy\2',
4                         1,
5                         0,
6                         'i'
7                        )
8    FROM DUAL;
REGEXP_REPLACE('AB+AB+AB+AB+AB+
xy+xy+xy+xy+xy+xy+xy+abc+abc+xy
1 row selected.
SQL> -- checking data with white spaces
SQL> SELECT REGEXP_REPLACE ('ab + ab + ab + ab + ab + ab + ab + abc + abc + ab',
2                         '(ab)(\W|$)',
3                         'xy\2',
4                         1,
5                         0,
6                         'i'
7                        )
8    FROM DUAL;
REGEXP_REPLACE('AB+AB+AB+AB+AB+AB+AB+ABC+ABC+AB',
xy + xy + xy + xy + xy + xy + xy + abc + abc + xy
1 row selected.
SQL> Regards,
Jo

Every second: md5 BUG in libdispatch: 12E55 - 1879 - 0x1b

Hi guys.
My Macbook Air acts a bit slow recently, and I checked the log files.
This is what I am seeing: EVERY SECOND an entry "BUG in libdispatch: 12E55 - 1879 - 0x1b".
Does anyone know how to fix this, or where to look for the cause?
- Max OSX Mountain Lion, latest version OS X 10.8.4 (12E55)
- Memory 8 GB 1600 MHz DDR3
I did not do anything "special" with it.
Thanks!
Aug 6 09:53:04 MacBook-Air-van-Jos-2.local md5[4824]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:05 MacBook-Air-van-Jos-2.local md5[4826]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:06 MacBook-Air-van-Jos-2.local md5[4828]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:06 MacBook-Air-van-Jos-2.local md5[4830]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:07 MacBook-Air-van-Jos-2.local md5[4831]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:07 MacBook-Air-van-Jos-2.local md5[4832]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:08 MacBook-Air-van-Jos-2.local md5[4834]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:11 MacBook-Air-van-Jos-2.local md5[4842]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:11 MacBook-Air-van-Jos-2.local md5[4843]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:12 MacBook-Air-van-Jos-2.local md5[4844]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:13 MacBook-Air-van-Jos-2.local md5[4846]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:13 MacBook-Air-van-Jos-2.local md5[4847]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:13 MacBook-Air-van-Jos-2.local md5[4848]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:14 MacBook-Air-van-Jos-2.local md5[4849]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:14 MacBook-Air-van-Jos-2.local md5[4851]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:15 MacBook-Air-van-Jos-2.local md5[4855]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:16 MacBook-Air-van-Jos-2.local md5[4857]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:17 MacBook-Air-van-Jos-2.local md5[4859]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:17 MacBook-Air-van-Jos-2.local md5[4861]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:18 MacBook-Air-van-Jos-2.local md5[4863]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:19 MacBook-Air-van-Jos-2.local md5[4865]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:21 MacBook-Air-van-Jos-2.local md5[4871]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:21 MacBook-Air-van-Jos-2.local md5[4872]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:22 MacBook-Air-van-Jos-2.local md5[4873]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:22 MacBook-Air-van-Jos-2.local md5[4875]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:25 MacBook-Air-van-Jos-2.local md5[4876]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:25 MacBook-Air-van-Jos-2.local md5[4877]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:25 MacBook-Air-van-Jos-2.local md5[4878]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:26 MacBook-Air-van-Jos-2.local md5[4879]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:26 MacBook-Air-van-Jos-2.local md5[4880]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:26 MacBook-Air-van-Jos-2.local md5[4881]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:27 MacBook-Air-van-Jos-2.local md5[4882]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:27 MacBook-Air-van-Jos-2.local md5[4883]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:27 MacBook-Air-van-Jos-2.local md5[4884]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:28 MacBook-Air-van-Jos-2.local md5[4885]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:28 MacBook-Air-van-Jos-2.local md5[4886]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:28 MacBook-Air-van-Jos-2.local md5[4887]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:29 MacBook-Air-van-Jos-2.local md5[4888]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:29 MacBook-Air-van-Jos-2.local md5[4889]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:29 MacBook-Air-van-Jos-2.local md5[4890]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:30 MacBook-Air-van-Jos-2.local md5[4892]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:30 MacBook-Air-van-Jos-2.local md5[4893]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:30 MacBook-Air-van-Jos-2.local md5[4894]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:31 MacBook-Air-van-Jos-2.local md5[4895]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:31 MacBook-Air-van-Jos-2.local md5[4896]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:31 MacBook-Air-van-Jos-2.local md5[4897]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:32 MacBook-Air-van-Jos-2.local md5[4898]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:32 MacBook-Air-van-Jos-2.local md5[4899]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:53:32 MacBook-Air-van-Jos-2.local md5[4900]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:54:05 MacBook-Air-van-Jos-2.local md5[4930]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:54:40 MacBook-Air-van-Jos-2.local md5[5040]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:55:11 MacBook-Air-van-Jos-2.local md5[5141]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:07 MacBook-Air-van-Jos-2.local md5[5495]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:09 MacBook-Air-van-Jos-2.local md5[5496]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:13 MacBook-Air-van-Jos-2.local md5[5499]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:25 MacBook-Air-van-Jos-2.local md5[5509]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:26 MacBook-Air-van-Jos-2.local md5[5510]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:32 MacBook-Air-van-Jos-2.local md5[5514]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:33 MacBook-Air-van-Jos-2.local md5[5515]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:40 MacBook-Air-van-Jos-2.local md5[5517]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:41 MacBook-Air-van-Jos-2.local md5[5518]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:42 MacBook-Air-van-Jos-2.local md5[5519]: BUG in libdispatch: 12E55 - 1879 - 0x1b
Aug 6 09:57:45 MacBook-Air-van-Jos-2.local md5[5523]: BUG in libdispatch: 12E55 - 1879 - 0x1b
etc.
etc.
etc.

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

Outputting a data point every second

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