OPC client in labview doesn't work... !

[marc987]

Hi everybody,

I have some trouble with the opc client in labview through I/O server , when I am adding a variable (or just want to view items) , I am connecting correctly to my opc server but my opc server tell me that :

" access path empty and no ! found into the item definition ( API47)!! "

 and after the labview opc client try to create a group but if I want to add an other item, he create an other group (try to...) . but that's funny because I still can see all my items in the browser and if I add this item to my library, launch my VI , nothing happend ....

I have tried to know if my opc server is working and it's work... !  the NI opc quick client (.exe) is working great , I have no trouble with that but when I am working on labview nothing works...

I have tried a opc VI that create an opc client with DSC module but I always have the same problem....

to resume : No trouble with the OPC server

                  No trouble with other opc client ( NI opc quick client , opc client from other constructor)

please can someone help me  ?!!!

Regards

thank you in advance

Marc

[ABCPrograms]

Hi Marc,

OPC allways gives issues, but I've learned in the past that it's not allways LabVIEW.  It can be Windows as well.

Here is a document I once found and solved some problems I had.  It's about DCOM settings.

I don't know whether you checked these already.