VI works in IDE, not after being built

Question

This is going to be a little long, but I'm not sure I have a choice. I'm using Mark Yedinak's SNMP v1 driver in LV2014 32-bit to talk to a Dell G756N rack mounted power distribution unit (think fancy power strip). My code works just fine in the IDE, but causes the program to freeze after I have built it into an executable. I have no idea what is wrong. I built a simpler example VI intending to have an easy example project (Classy Talker.vi in the SNMP Talk project) of where the VI breaks down, but it seems to work even after being built into an .exe. I built the InitializePDU.vi (the one that works) in the SNMP Talk project by dragging the innards of the problem vi (InitializeEquipment.vi in the Dell Power Supply Testing project, this one doesn't work after being built), so they should be identical.
Using logs, I've been able to track which one is the problem vi. It's the Get snmp Item(s).vi in Mark's snmp communication.llb. Here is a picture of where it fails according to my LVLog.txt file:
To recap:
In the Dell Power Supply Testing project
The Data Collection Quick Shot.vi under "Main" calls Initialize All Equipment Data-Clock.vi. The Initialize All Equipment Data-Clock.vi is responsible for reading the Equipment Config.xml file and presenting the user with choices of equipment to use with the program. The .vi then uses a factory pattern to initialize chosen equipment. 5 of the equipment types work, but the Power Distribution Unit will not complete verification after being built into an executable (this is event 10, "PDU Verifiy), but works fine in the IDE. Using logs, the probelm occurs after the class is cast to the specific class in the InitializeEquipment.vi found under "Hardware\Power Distribution Unit\DellG756N\" when it call Mark Yedinak's Get snmp Item(s).vi from his snmp communications.llb.
The SNMP Talk project was created to be similar to the problem areas of the Dell Power Supply Testing project. I was hoping it would be a simpler example so that I could get help, but to my suprise it works just fine even after being built into an executable.
The Classy Talker.vi casts the GenericPDU class to the DellG756N class, and uses the InitializePDU.vi which is the equivalent to the problem vi InitializeEquipment.vi in the Dell Power Supply Testing project. It then just reads the manufacturer and part number from the supply, which is also done in the same manner as the InitializePDU.vi.
Any help on why one built executable work and the other does not would be really appreciated.
Thanks,
Simon
P.S. I couldn't power the Power Supply Testing project here because it is 54MB, so here is a link to it in my dropbox:
https://dl.dropboxusercontent.com/u/10871313/Power​%20Supply%20Testing.zip
Solved!
Go to Solution.
Attachments:
SNMP Talk.zip ‏1123 KB
LVLog.txt ‏1 KB
snmp communication.zip ‏470 KB

Answer 1

To follow up, Drew Pierce from NI came down to look at the issue. The morning before he came I was expanding my use of log files and finally had an executable build work. I was a little too quick to think I had the issue solved and threw a 2ms wait where the last log file was thinking it was a timing issue. Nope, it was broken again. So I put all of the logging functions back in, then took them out 1 by 1 until I found the one that fixed it. I have no idea why it fixes it, but it does. The offending vi is Mark Yedinak's SNMP Get Request. Here is the fix:
And the Write Log:
I have no idea why this works and just putting a wait doesn't:
If anyone has a theory I'd love to know.
Thanks,
Simon
P.S. I want to be clear that I'm not saying Mark's code is bad, it works flawlessly elsewhere and I'm very thankful he provided it. It has saved my life on this project.