C sharp code error while operating NI PXIe-1073 and NI PXIe-6535

[Hemanthino]

Bonjour a tous,

I have a C# code interfacing a device to do some acquisitions with the NI PXIe-1073 chassis and  NIPXIe-6535. This code was developed long ago by another guy who is not accessible anymore and I don't have any clue in C# code to control NI card but I have always used LABVIEW to control it till now.  This code was working untill recently. Then the PC was upgrared to 16 GB RAM and OS. Since then, this code shows some error given below;

Afterwards, we have dowgraded the PC to the previous configurations but still the code shows the same error. If anyone has any clue about this error and how to solve this, please reply. It would b really helpful to save my time.

Thanks a lot in advance

Best regards

Hemanth