KoBe

Hi, I would like to have a stand-alone installer running on a host pc which is able to install a certain set of drivers on a PXI (like in MAX). The reason: We ship the same type of PXI together with our test benches to our costumers and when we would like to update the rtexe application, the drivers on the earlier delivered PXIs are to old, to be compatible with the newest software release. How can that be solved? I heared about images of PXI installations. Don't know if an image is a good idea? The problem is, that we need to have at least one PXI of each kind in house, to build the image for all PXIs out there. Thats not really suitable for us. If I find a bug and want to send a fixed software the the costumer or if I want to enable new software features on the existing PXIs I would prefer to be able to build an rtexe-installer, which inlcudes all needed driver versions. It should be more or less simple to use right out of the LV project, like it can be done with the PC applications installer (including Run-Time Engine and additional selected files like dynamic loaded VIs). Has anyone an idea or some suggestions on how to install programmatically drivers on a PXi from remote? In general i have no permission to enter in the costumers network from our site. They also do not have there own develoment systems, just run-time-engine. I'm using LV2012 + RT on Windows 7 and PXI RT8100 Thanks in advance. KoBe

Acutally I'm using separation of compiled code, I'll give it a try an delete my object cache before restarting my programm. Where would you use the "Always copy"?

Hi, I have a strange problem in one of my variables. I use that variable to store data which are displayed on a Wfm-Graph. One VI inserts new data into the variable and writes the changed value to the variable. Everything works fine most of the time, but sometimes certian values change their value to 0. My target is a Win-7 PC The data type is: Chart_XY_Signals (1-D array of) XY_Signal (cluster of 2 elements) Name (string) XY_Data (cluster of 2 elements) X (1-D array of) X-Value (SGL) Y (1-D array of) Y-Value (SGL) A new value-pair consists of a monotony increasing X-Value ( 1,2,3..........) and a data value for Y-Value. In additional information is used to state the signal, in which the data has to be stored (index of Chart_XY_Signals). I use following steps in a loop, which gets new values from a queue: 1) Read Variable - loop for all new values comming in 2) Index Array Element of Charts_XY_Signals 3) Unbundle X and Y of XY_Data of XY_Signal 4) Append X-Value and Y-Value to the arrays X and Y 5) Replace new X and Y with Bundle by Name in XY_Signal 6) Replace new XY Signal in the Chart_XY_Signals array - end of loop 7) Write Variable The error is following: sometimes the data structure gets corrupted: Assume 4000 value-pairs for each signal (about 40) are stored in that structure, it happens that some old Y-Value or X-Values are unintentionally changed to 0. In my WfmGraph this makes horizontal lines to X=0 or vertical lines to Y=0 which looks ugly and must be resolved before delivery of the project. I checked my code and debugged it and came to the conclusion, that the error can not be a programming error, because: The first time, a 0 value is detected after point 3) !!!! That means somewhere in Read / Index Array and Unbunble the data is corrupted. Writing new data at point 7) makes the old value lost forever. The other possibility: The error occurs somewhere in Bundle / Replace Array element an Write. I thought this parts would never fail an therefore i never cross-checked the whole bundled data before Write. The variable can't be the problem. I used: 1) Global Variable 2) Data Value Reference 3) Functional Global Variable (FGV) As index/replace and bundle/unbundle is used both, nested in place structures and normal style. Can't understand where the problem comes from. Has anyone experienced similar problems or has an idea why I'm running into that s***? KoBe

Hi, i have a big problem: im my project I need to evaluate the difference between the RT timestamp and the Read X-NET CAN Frame Timestamp to sort my incoming data. System: PXIe-8100 RT Controller; PXIe-1071 Chassis; PXI-8512 CAN Card Unfortunately it came out, that these timestamps are not synchronized and have a different clock speed. I after some time it seems like I would receive the CAN messages before I trigger the external Hardware to send me a CAN frame. I asked the support, if connecting the CAN Card Mastertimestamp with Clk-10 of my PXI would synchronize both clocks, but i was told, that the RT timestamp is software and can not be synchronized with any signal off the PXI backplane. I hope really that this i not all of the truth, maybe there is some kind of workaround to synchronize the RT Timestamp with a fixed PXI clock. If there would be a fixed offset between RT Timestamp and the X-NET Timestamp I can correct it by software, but the varying offset at the moment is a serious problem for me. Hopefully someone has I great idea!

Hi, I'm using source control for a few months and since some weeks I'm not the only developer. Earlier i had all project files and library files locked by me, to avoid those "recompile save requests". But now I have locked only a portion of the code and it happens more often to me and my colleague, to loose some developed code, due to the "Don't save", because sometimes we are thinking to don't save only the recompiled code. I read many threads on "separete compiled code from source" and I was wondering, if LV2011 is running stable with that. My NI support is quite busy at the moment to give me a clear answer about that. Could anyone please answer my question "Should I use this feature in LV2011?" just with "Of course" without a following "but ...." ?? Our libraries are developed from LV2009 on, we did not use any earlier version. Has anyone experience with LV-RealTime and RealTime targets and separated source code? How does that work? Any issues? From the programming style point of view we aren't usingh neither object oriented programming, neither dynamically called VI's. Just plain LV VI-SubVI and Control typedefs. Recompile often happen to us, just opening a VI in our Project under HOST and RT target, which use the same SubVI placed in our user.lib Just opening the calling VI of our user.lib VI once for the HOST and the another VI calling the same user.lib VI on the RT, causes a recompile of the user.lib VI. That is really a problem, because in some cases I'll be asked to save 50 or more VI's, just because of opening the MainRT after closing the MainHOST due to this recompile issue. Any ideas? Any advice? Is the only way to resolve that to going to separate code from source?

This short instruction answers already all my questions. Thank you! Your picture made me understand the short instruction from asbo. Thanks you!

Hi people, i have quite a big project and therefore I would like to make the block diagram of my MainVI more readable. There are several parallel task packed in SubVI's, which looks really pretty. The last challenge for me is the Event Structure of the MainVI. With this Event Structure I react on user input on the MainVI Controls and Indicators. At the moment I haven't implemented any User Events. Now I'm searching for a possibility to move the Event Structure of the MainVI in a SubVI to make it also more compact. Is the a possibility to do that? In fact this would mean, a SubVI must be able to handle Events fired by it's MainVI. Can anyone help me please? Thanks in advance!

Hi, I've written a program, which saves some data in TDMS files. One part of data is written in interleaved mode. The other data is written in decimated mode to another file. With Excel I can import the decimated data file without any problems but the interleaved data file crashed Excel. Although the file has only around 50kB, according to the Windows Task Manager, Excel reserves in a second more the 1 GByte of RAM and than it crashes. Excel 2007 with TDM Importer 3.2.0.18 Labview Professional Development 10.0 32-bit It looks to me as Excels couldn't find the end of the file. The Labview TDMS Viewer hasn't any problem with the file and shows the expected data content. Excel throws this Error Window: TDM Importer: USI encountered an exception: Unhandled Exception in Initialize I tried also to delete the *.tdms_index file and defragmentation before importing the TDMS in Excel without success. At the moment I'm installing TDM Importer 3.2.2.0. Maybe that works better. If anyone had the same or different problem, please let me know your solution. You find attached the interleaved TDMS file and the Error log by Excel.

Hi, thanks a lot for your quick replies. I will check the point with the conditional probes. The Pause button was definitely not the problem. In my case it has also nothing to do with the IPE structure. I'll inform you, when I have news.

Hi people, found a strange behavior in some of my VI's during debug: Sometimes it happens to me, that a program stops always at the same point of a VI or SubVI, even though there is no breakpoint. It behaves like a breakpoint, but there is no breakpoint. I discovered, that it happens more often, when I have a Probe Watch Window open, but the position of the signal probe may be also in a different location in the VI block diagram, and it still stops at the same nonexisting "breakpoint". When I close the Probe Watch Window, the programm (e.g. a loop) does not stop anymore at the mentioned point. My question: How can I resolve this strange problem? Is this a feature of Labview and I only don't know how to handle it? I'm using LV 10.0 32-bit Professional Development Environment.

Hi people, I'm working with Labview 2010. A part of my project is the CAN communication between PC and some custom hardware. I'm using CANUSB with the delivered DLL Library in Labview. For test purposes only, I connect a second CANUSB device (running on the same PC) to the bus. With the WGSoft CAN Monitor Pro I should be able to define message triggers to which it has to answer: Example: Sending with Labview CANUSB1: ID:0x385 Message: 0x01 Length: 1 Message Trigger in WGSoft ID: 0x385 Message 0x01 (00 00 00 00 00 00 00) Mask: 0x 00 00 00 00 00 00 00 00 (????) Length: 1 CANUSB2 should then respond on the message with ID: 0x065 Message 0x 08 98 09 60 0A 28 00 (00) Length: 7 Problem description: CANUSB2 responds only the first time to a request by CANUSB1 WGSoft Monitor shows first: ID: 0x387 EXT: 0 RTR: 0 DLC: 1 MSG: 0x 01 00 00 00 00 00 00 00 ID: 0x065 EXT: 0 RTR: 0 DLC: 7 MSG: 0x 08 98 09 60 0A 28 00 00 second time ID: 0x387 EXT: 0 RTR: 0 DLC: 1 MSG: 0x 01 98 00 00 00 00 00 00 Strange that the Monitor Program shows 0x 01 98 ..., seem like the second byte from CANUSB1 gets overlayed with the second byte of CANUSB2. Has anyone an idea how to fix this problem? I get often also arbitration error, a red constant led on the CANUSB appears and I don't know how to clear this error by software and i don't know how to prevent it. Does anyone know if i should set the RTR in my request to 0x 01, even though the response has a different ID? Each second time I connect to CANUSB via Labview my Labview gets stuck somewhere in the open Dll call. I leave the szID empty, because it doesn't work if I would like to search for a certain CANUSB device with it's serial number? Anyone an idea why Labview gets stuck so often with this CANUSB driver?? I know, lots of text, but if you even have only answer to one of all these questions I would be really happy to know it an to share it with LAVAG. Thanks

Thanks a lot for your VI. I allready programmed something else: I'm opening the Queue in the loop, preview an element and then close it again with force destroy=false. Didn't have yet the possibility to test the code. What happens if I close a Queue reference with force destry=false? Doesn't it mean that at least one reference remains open somewhere? A final destruction is done with force destry=true ??

At the moment I'm "offline" / have no possibility to access the cRIO to try your suggestions. Nevertheless I thank you very much! In the meantime I found exactly what I was searching for: an official NI statement about memory leakage with Queues. When I'm online again I'll try to fix that leakage like described below and the I'll let you know if it works. http://zone.ni.com/reference/en-XX/help/371361E-01/glang/create_queue/ Obtain Queue Details Use named queues to pass data between two sections of a block diagram or between two VIs in the same application instance. If you do not wire name, the function creates a new, unnamed queue reference. If you wire name, the function searches for an existing queue with the same name and returns a new reference to the existing queue. If a queue with the same name does not already exist and create if not found? is TRUE, the function creates a new, named queue reference. If you use the Obtain Queue function to return a reference to a named queue inside a loop, LabVIEW creates a new reference to the named queue each time the loop iterates. If you use Obtain Queue in a tight loop, LabVIEW slowly increases how much memory it uses because each new reference uses an additional four bytes. These bytes are released automatically when the VI stops running. However, in a long-running application it may appear as if LabVIEW is leaking memory since the memory usage keeps increasing. To prevent this unintended memory allocation, use the Release Queue function in the loop to release the queue reference for each iteration. This function might return error codes 1, 2, 1094, 1100, 1491, or 1548.

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Thanks Tim! You're right, I'll insert Close FIFO. If the program would work without problems, I would reach that point after 2 years of running the loop with Meetbox FIFO which means ending the data logging period. And in that case it doesn't mather if the program crashes. But for correctness i'll insert everything. Nevertheless I don't know why my code would run infinitely in debug mode and on the other hand causes RAM overflow running with a build rtexe.....