This VI is part of a LabVIEW class. No part of the class is executable at this time because one of the member VIs is missing. However I am not missing a vi

Question

I only have 1 vi and its not missing.  The 1 vi claims the owning library has blocked the execution of the VI.  The class has the error "This VI is part of a LabVIEW class. No part of the class is executable at this time because one of the member VIs is missing. Find the missing member VIs on disk and load them into memory or delete them from the class definition in the project tree."
But there is only 1 member vi!!??
I had lots of other vi's as part of this class but somehow this class got botched with this error.  I removed all vi from the directory and from the class definition and re made just the one assessor vi and still got the error message.
I have attached my ridiculously simple class.
I have other classes that work fine but somehow this one seems to have gotten botched.  I really need to understand what happened here and how to recover/avoid this error or I will not have the confidence to develop large applications using classes.
In other words...PLEASE HELP!
Solved!
Go to Solution.
Attachments:
Tree class.zip ‏14 KB

Answer 1

I cannot tell you why.  Only what it is missing.
If you look in the Tree.lvclass file using something like Notepad, towards the bottom you will see some XML that looks like:
<Item Name="Untitled 1" Type="VI">
        <Property Name="NI.ClassItem.ConnectorPane" Type="Bin">#1#!!!!!!!)!"1!&amp;!!!-!%!!!@````]!!!!"!!%!!!$H!!!!#1!-1#%'=X2B&gt;(6T!!!,1!-!"'.P:'5!!""!-0````]'=W^V=G.F!!!71&amp;!!!Q!!!!%!!AFF=H*P=C"P&gt;81!"!!!!#*!=!!?!!!/$&amp;2S:75O&lt;(&lt;'&amp;T=Q!!#&amp;2S:75A&lt;X6U!!!A1&amp;!!!Q!!!!%!!B.F=H*P=C"J&lt;C!I&lt;G]A:8*S&lt;X)J!#"!=!!?!!!/$&amp;2S:75O&lt;(&lt;'&amp;T=Q!!"V2S:75A;7Y!0!$Q!!Q!!Q!%!!1!"1!%!!1!"!!%!!9!"!!%!!=#!!"Y$1A!!!!!D1M!!!!!!!!!!!A!!!!!!*!!!!!!!1!)!!!!!!</Property>
        <Property Name="NI.ClassItem.ExecutionSystem" Type="Int">-1</Property>
        <Property Name="NI.ClassItem.Flags" Type="Int">0</Property>
        <Property Name="NI.ClassItem.IsStaticMethod" Type="Bool">false</Property>
        <Property Name="NI.ClassItem.MethodScope" Type="UInt">1</Property>
        <Property Name="NI.ClassItem.Priority" Type="Int">1</Property>
        <Property Name="NI.ClassItem.State" Type="Int">1342841344</Property>
    </Item>
Delete this block.  Make a backup of the file before you do that.  Start up LV and load the class again.
My guess is that something probably did not save properly when LV shut down.  I have a large OO project and have had more than one occasion where I have corrupted the project but could ot figure out why. 
Today I had a similar message which is why your post caught my eye.  In doing some troubleshooting I found that it no longer 'knew' where one of my files was but it never complained when it loaded the project.  I went back to the original project and tried to open that vi from the project.  That is when it told me that the vi was not in the expected location, do you want to correct it.  I said yes and all was better. 
Trying to open all of the VIs in the class might have worked, but this can be cumbersome to say the least in a large class.
Good luck,
Kurt