topic Re: Not enough memory to complete this operation in LabVIEW

Not enough memory to complete this operation

vishal231 — Tue, 29 Oct 2019 13:03:54 GMT

Hello,

I am using labview2018, I am acquiring data from a VI running on Crio 9047 and writing data on csv file on another VI running on my Computer through variable

acquistion (rate is 50k)is proper but when writing data in csv file, a single writing is only possible, if I try to write more number of files, ist showing error : not enough Memory to complete this Operation.

sometime even my LabVIEW gets close after this error.

my VIs are attached

Re: Not enough memory to complete this operation

Mark_Yedinak — Tue, 29 Oct 2019 14:57:05 GMT

Why do you have a timeout on your dequeue in your save VI? I don't see a need for this. You can also skip the Wait in the upper loop in the save VI since the queue itself will provide the wait functionality. I would avoid writing single elements to your file. File I/O is the bottle neck. Change your processing to write data once per second but write all the data that has been queued during that time in a single write. To do this you flush the queue once a second, process the array of elements from the flush and then call a single writ e to the file. I would use a single stop button to stop your processing. I prefer to use actual messages for communications with queues so you can have an explicit stop message which would stop your consumer. Why are you calling the queue status? It servers no purpose in your code.

Re: Not enough memory to complete this operation

vishal231 — Tue, 29 Oct 2019 16:08:40 GMT

thanks for Input but,

How would i flush the Queue after 1 seconds ?

I did some changes but now after every saving of 4-5files (can save data for around 30 seconds only) my LabVIEW gets closed.

Re: Not enough memory to complete this operation

crossrulz — Tue, 29 Oct 2019 16:58:30 GMT

STOP USING THE NETWORK PUBLISHED SHARED VARIABLE!!! I actually deem them evil, especially in this situation where you need a Stream communication, not a Tag. What you really should have here is a Network Stream or TCP/IP connection to stream the data from the cRIO to your PC, which then saves the data. It would eliminate one of your loops (the Network Stream/TCP connections would act as the queue).

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 07:06:26 GMT

hello,

actually I am new to the LabVIEW, can you please tell how to use Network streams in this application?

Re: Not enough memory to complete this operation

Rahulbala — Fri, 29 Aug 2025 22:14:36 GMT

Hello Vishal

You can find more about Network Stream in the links given below.

https://www.ni.com/en/shop/labview/lossless-communication-with-network-streams--components--archite.html

http://www.ni.com/documentation/en/labview-comms/latest/g-prog/streaming-data-using-network-stream/

Refer examples as well.

-Rahul

Hit KUDOS for Thanks

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 09:35:49 GMT

hello

I created writre and read Network streams for my application but my writer is not taking the data in acquire VI please have a look

Re: Not enough memory to complete this operation

crossrulz — Wed, 30 Oct 2019 11:18:33 GMT

Your Write To Stream needs to be inside of your acquisition loop.

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 11:22:15 GMT

even i did some chnages but the Network stream write loop ,it is not taking the data

please have a look in this code

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 11:54:22 GMT

hello crossrulz thanks for your Reply i did the required changes as told by you

but reading of sampling is not Happening .

do the Reader has to respond ? so that the while loop will run and reading of the sampling will be done

Re: Not enough memory to complete this operation

crossrulz — Wed, 30 Oct 2019 12:00:23 GMT

You are most likely waiting for the host to make the connection. What I usually do for these types of applications is use a sort of State Machine on the cRIO that just manages the network connection. It can receive data from the acquisition loop via a queue and either pass it through the Network Stream (if connection is valid) or ignore it (if connection is invalid). This network loop can detect disconnections using errors and go back to trying to connect while still clearing out the queue.

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 13:55:34 GMT

thanks crossrulz

but why it is not making the Connection in this case ? my IP is correct

Also, where should i learn more About Queue with state machine ?

do you know some examples related to my application ?

can you send some examples or links realted to my application

Re: Not enough memory to complete this operation

crossrulz — Fri, 29 Aug 2025 22:15:13 GMT

@vishal231 wrote:

but why it is not making the Connection in this case ? my IP is correct

Also, where should i learn more About Queue with state machine ?

do you know some examples related to my application ?

can you send some examples or links realted to my application

The connection has to be made on both sides of the Network Stream (cRIO and the host). So I suspect you did not run your PC VI.

Producer/Consumer, State Machine

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 14:44:20 GMT

I did ran the PC VI simulaneously , still Acquisition loop is not working . what can be the issue

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 14:59:24 GMT

yeah , it did connected now , but yes i have to learn to make a state machine

Re: Not enough memory to complete this operation

vishal231 — Wed, 30 Oct 2019 15:46:20 GMT

hello crossrulz,

How can i convert 2d Array waveform of data(dbl) to 1d Array waveform (dbl)? for saving the data in th save VI running on PC

Re: Not enough memory to complete this operation

crossrulz — Wed, 30 Oct 2019 18:53:57 GMT

You have a loop in there you just don't need anymore. You can read a single waveform from the Network Stream and then use a queue to send that to your consumer loop. The Network Stream is to replace your Network Published Shared Variable.

Re: Not enough memory to complete this operation

vishal231 — Thu, 31 Oct 2019 11:50:31 GMT

hello crossrulz,

thnaks for your help

now i am able to collect data on Excel file.

I havent made any state machine , or Queue Operation in my acquire VI running on Crio yet.

But, I have to run both the file for saving data and Monitoring the data on frontal panel

Now,I want to monitor my data too, Maybe from acquire VI, but, its only possible when i start the saving VI on PC .

I need to select time from front panel to save data for that time and monitor data contineously

Re: Not enough memory to complete this operation

vishal231 — Thu, 31 Oct 2019 13:23:42 GMT

hello crossrulz,

When i am reading the data from Read multiple Elements from stream from VI running on PC through probe, it is is in the Flash form , it is not continuous , I want to monitor the data from VI on pc but ist not possible properly why?

Re: Not enough memory to complete this operation

vishal231 — Mon, 04 Nov 2019 09:08:13 GMT

Hello ,

Thanks for help

still ,I am not able to figure out how to use the state machine in my application.

I did used the Queue but, I have to run bothe the VI to save data (also i have to start the save vi first and then acq VI which is acquistion VI)

I Need to monitor the data on save vi and Need to save the data on that VI only through a timer

I have attched the updated VIs