Cannot get data from variant (callback VI - activeX)

[THANG NGUYEN]

I register a callback VI with an activeX module. This activex is used to communicate with another device. Whenever I send a command through this activeX to another device, there will be a respond from that device. But I cannot receive it. The data in the variant presents that the data return is an array, but I cannot get anything.

Could you please tell me how to get this data?

Thang Nguyen

[smercurio_fc]

Did you try the Variant to Data function (Programming->Cluster & Variant palette)? You need to provide the type of data to convert to, which is just wiring an array constant of the right datatype.




Message Edited by smercurio_fc on 02-01-2008 12:47 PM

[THANG NGUYEN]

Hi,

I did try with Variant to Data VI and Variant to Flattened String VI. When I use Variant to Data VI, I received this error:

The data type of the variant is not compatible with the data type wired to the type input.

I tried with type string or array of unsign integer 8-bit.

[smercurio_fc]

Well, you have to know the type of data that's in the array. This should be documented. Otherwise, you can just keep changing the datatype until you get it.