LabView 8.6 ActiveX Data Typing Issue

[William Gagne]

Hey Guys & Gals,

Fairly new to the Labview ActiveX tools... I have a 3rd party API [x.dll] I am duplicating some VB.net code [and adding other features] in Labview... I create a reference [Automation Open], access the parameters via Invoke Node, most of the parameters are double integers, and work fine. A couple parameters [in .net] are system.array of doubles. In the invoke node, they show up as variants... I try to take the LabView array of double, "to variant" or coerced, neither method properly get the data table into the api... any ideas?

Thanks in advance,

Bill

[Anders Björk]

I had some similar problems the solution was to use "Variant to data" with no type wired! ... maybe it works for your problem as well.

[2and4]

I've had this problem. Take a look at the attached picture. My ActiveX server was a LabVIEW EXE and so was my ActiveX client (the shown VI). In your case your ActiveX server will be your API and your ActiveX client is your VI.

I had to do what is shown in the attached picture to solve my problem. I thought that paramVals was a 2-D array, but it turned out it was a variant which itself contained a 1D array of variants. Each of the 1D arrays in turn contained a 1D array of variants. It took a lot of digging around in documentation to figure this out.