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Dan Bookwalter N8DCJ

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About Dan Bookwalter N8DCJ

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LabVIEW Information

  • Version
    LabVIEW 8.6
  • Since
    1996

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  1. Dan Bookwalter N8DCJ

    Need to copy a class rename it and set its parent programmatically

    Well , your memory is working , I went back and disabled the part that replaces the DD control , and it works as expected , I think I will just rename it ... the 2 others on the front panel are of the Default class , (In/out) , it appears I have to replace them as I get the Connector pane doesn't match on the DD vi's if I don't .... it works , so now I will move on to the next issue on my list , I may come back and revisit it at a later date to see if I am doing something not quite correct... Dan
  2. Dan Bookwalter N8DCJ

    Need to copy a class rename it and set its parent programmatically

    Yep , basically all I did ... if I don't change the controls , it doesn't work correctly , I will investigate a little more and see if I can eliminate that step... Dan
  3. Dan Bookwalter N8DCJ

    Need to copy a class rename it and set its parent programmatically

    Ok , I decided to start over , turns out there is an invoke node LVClassLIbrary.Save a copy... this copies everything to a new directory , then I just need to replace the control(s) , set the parent and save the whole thing using Save All This Project.vi.... works perfect ... thanks for the pointers .... Dan
  4. Ok , I would like to programmatically copy a Default class and a Default Test.vi to another folder say , XYZ , rename the Default Test.vi to XYZ.vi, then change its DD terminal from the default class to the newly created XYZ.lvclass and add it to the project. I currently can do everything I need to do , except , after changing the XYZ parent to the Default class I copied it from , add it to the project etc.... When I try to open the newly created/renamed XYZ.vi from the project I get a dialog box that says , "Default.lvclass:XYZ.vi" is at the expected path but it is part of a library. Default.lvclass:XYZ.vi" will be opened but it will be removed from the project". I really need to be able to do this programmatically , we will have hundreds of test cases that will have different functionality but use the Default Test.vi as a starting template , I also have to assume that future users will be totally unaware of classes and how to create/use them... I have a framework that should be very expandable in the future , I just want to automate as much as possible.... <EDIT> I should mention this is in LV2012 <EDIT> TIA Dan
  5. Dan Bookwalter N8DCJ

    LV2012 - Copy a class with inheritance intact

    Well , I closed LV down and restarted it and opened the project , now I can do a save as and preserve the inheritance , no clue why it didn't work yesterday , but , seems go to go now.... Dan
  6. I have a class that I would like to copy (up to 70 times) and keep its inheritance on each copy , I tried doing a save as but , that didn't work.... just trying to avoid re-creating this dozens of times , the main reason for doing it this way is to take advantage of DD , and that we can override a couple of the instances ... Dan
  7. Dan Bookwalter N8DCJ

    Need help with an Arbitrary Waveform Generator - Fluke 284

    Well as usual , after I post on a public forum , I figured it out , not sure if it is the best way , but , it works... I create the half sine arbitrary file , load it up to be "played" , set trigger to external , set burst count to 1 , then when I need the pulse I use a software force trigger command... Dan
  8. I am totally new to Arb's , I need to output a single pulse of a half sine wave .... how does one go about that ? TIA Dan
  9. Dan Bookwalter N8DCJ

    Populating Combo Box in an Array

    Hooov Thank you sir .... done.... Dan
  10. Dan Bookwalter N8DCJ

    Populating Combo Box in an Array

    Hooov I was kind of worried about that .... I have already started down the road of populating as the user clicks on the control... I wish there was a more elegant way of doing this , but , I can deal with it this way .... Or if a Multi Column list box would allow you to highlight different cells in columns I could work with that too... My limited messing with the multi column list box it didn't appear I can do that either... Thanks Dan
  11. Dan Bookwalter N8DCJ

    Populating Combo Box in an Array

    Ok I must be overlooking/overthinking this , but , I have an array with a cluster that has a String control and a Combo box that needs to get populated .... I cant seem to get the combo box to populate properly... how does one go about setting the string values of the combo box in each cluster/array element , every element gets populated with different data. Thanks Dan
  12. Dan Bookwalter N8DCJ

    Complex Numbers .... coding ... need help

    I have not messed with complex numbers in probably 30 years or more... I have a snippet of Matlab code that I need to wire up asap , I made a couple of feeble attempts and decided to ask the experts. I need a wiring soluition for this: exp(sqrt(-1)*angles) I assume it is pretty simple? TIA Dan
  13. Dan Bookwalter N8DCJ

    High Temperature Air Velocity measurement

    Hi All I am hoping someone here has some ideas for me on this one , I need to measure velocity of gas (in this case air) through a pipe , that's easy enough , however , the temperature of the gas ranges from 100C to about 1200C and from maybe 10 m/s up to ~120 m/s. Any Ideas ? Dan
  14. Hello All I have been away from LV programming for some time other than some quick DAQ stuff to solve a problem , well , I am back into a couple of projects and since I am starting anew I will go the LVOOP route. I used LVOOP in its early days and drove Stephen nuts back then , so , to spare him even more frustration I will ask the experts here. This is very basic , but , my memory isn't so good anymore so I need a re-fresher. What I am doing is taking data using my DAQ Class from three sensors , Temperature , Flow and DUT output , I need to do a little processing on the data and was going to have each type be its own class , especially since I am sure the sensors and processing will change down the road. But , as I got into it , no matter what route i went down (via LVOOP) it seemed to be awkward whatever way i was approaching it and stopped and decided to see what you guys suggest , I know it is very basic but what is the best approach (design pattern) to use for something this simple. In addition to the processing the data I also need to Graph it , save it to file etc... all the usual stuff we do with data... thoughts... Dan
  15. Dan Bookwalter N8DCJ

    LV 8.6.1 Web Server will not start in EXE

    Ok , i figured it out , i had to go into the niwebserver.conf file and change the document root from .//..//...//www to c:/www Dan
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