Null refum error when calling dll

[george seifert]

I have an ActiveX interface that's giving me some problems. I'm able to create a reference where I can select the ActiveX class. I can also create properties and methods. When I run my code I get the follow error when I try to set a property.

Error 97

Null Refnum was passed in as input

If I put a probe on the reference it shows the value as 0.

Any ideas what's going on? I've programmed ActiveX interfaces before but haven't run into this.

George

[Dan DeFriese]

QUOTE (george seifert @ Dec 19 2008, 09:53 AM)

I have an ActiveX interface that's giving me some problems. I'm able to create a reference where I can select the ActiveX class. I can also create properties and methods. When I run my code I get the follow error when I try to set a property.

Error 97

Null Refnum was passed in as input

If I put a probe on the reference it shows the value as 0.

Any ideas what's going on? I've programmed ActiveX interfaces before but haven't run into this.

George

Hard to say without seeing the code. The error code would appear to be telling the truth (0 is a NULL refnum). Is the Refnum 0 immediately after the Automation Open.vi?

[george seifert]

QUOTE (Dan DeFriese @ Dec 19 2008, 10:10 AM)

Hard to say without seeing the code. The error code would appear to be telling the truth (0 is a NULL refnum). Is the Refnum 0 immediately after the Automation Open.vi?

Man you guys are good. I didn't need an Automation Open in the other stuff I did, but it looks like I needed it now. Thanks much.

George