Why can't I use Microsoft Message Queuing in Labview 64-bit mode?

[kskaro2]

I have an application in which I am trying to use MQ messaging to talk directly to our database, to which we send and receive messages regarding the product we are testing. I am using Labview 2016 and Windows 10. The .NET version is 4.6.0 and the MQ messaging version is 7.0.1. The application runs great in Labview 32-bit, but when I switch to 64-bit it won't work, I get an Unknown System Error when I initiate the MQ connection function to send a message. I noticed that when it fails, the MQ reference input to the MQ Connection property node passes in a zero. When it worked it would pass in a valid reference number. I am trying to switch to 64-bit to enhance the memory usage.

[billko]

Off-hand, I'd say that the 64-bit dll for the messenger - if there is one - isn't installed on the computer.

[kskaro2]

Thanks for the input, but I checked and all the necessary MQ dlls are loaded.

[billko]

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@kskaro2 wrote:

Thanks for the input, but I checked and all the necessary MQ dlls are loaded.

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They are 64-bit dlls?  This is important, because a 32-bit app can't call a 64-bit dll and vice-versa.  I know you probably checked that, but since you didn't mention it, specifically, I thought I'd just make sure.

[kskaro2]

I understand what your concern is, but I was told by the person from our company, who developed the tool implementing the MQ messaging, that all necessary 64-bit dlls were loaded as part of the tool.  

[billko]

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@kskaro2 wrote:

I understand what your concern is, but I was told by the person from our company, who developed the tool implementing the MQ messaging, that all necessary 64-bit dlls were loaded as part of the tool.  

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I figured you had that base covered, but I just wanted to make sure, since you didn't mention it explicitly beforehand.  Now it makes it more complicated.  I see rumblings about LabVIEW 64-bit and ActiveX on a Google search.  You might want to look at that.

[kskaro2]

Thanks a lot for your input Billko. I will check out your suggestion.