A strange problem just cropped up for me after upgrading my application to .NET 4.5.

I have been using CyUSB.dll without a hitch for years. However, when I upgraded the rest of my app to 4.5 the constructor for USBDeviceList started throwing an Arithmetic Overflow Exception in unmanged code. This exception only seems to be thrown when running on Window 8 x64. (I am running W7 x64 as my dev. machine and it didn't pop up until testing on other platforms)

The root of this exception ssems to be your useage of ToInt32() in the API. However, I'm not sure why that doesn't break things running on Windows7x64 or with .NET 3.5 in W8. (During this whole process I did not rebuild the wrapper .ddl I wrote to interact with CyUSB.NET or change out the API .dll)

Is there a workaround for this?

 Hi,

Please migrate to the latest SuiteUSB 3.4.7 (http://www.cypress.com/?rID=34870), and check if the issue persists. If it still exists, please create a tech support case at www.cypress.com, so that one of our engineers can help you in fixing the issue.

Regards,

Gayathri

I have, thanks. 

I can get it to run if I force my application to target x86 architecture. However, that is suboptimal. No idea why it's only a problem in W8 and .NET > 3.5...

I will file a support ticket. 

 I just upgraded to Windows 8 64bit and I have the same issue.

Have you found a workaround other than to target to x86?

I need a lot of ram, and x86 is a bottleneck for me.

Regards,

Gabriel Camiro

 Hi,

Can you please upgrade to Superspeed SuiteUSB (available from http://www.cypress.com/?rID=57990) and see if the issue persists. sorry that I missed out that compatoble OS for SuiteUSB3.4.7 are Windows 2000, XP, vista and Win7. Whereas Superspeed suite supports Win 8 beta. Please test and let us know if you seen any issues.

Regards,

Gayathri