OPC server error with Lookout 5.1 that was working with Lookout 4.5

[CasSch]

I was running a file on Lookout 4.5 with Field Point explorer 3.0 with field point objects. I recently upgraded the Lookout to 5.1 and Field Point Explorer was uninstalled. Now when I try to open my old Lookout file, I cannot control through the field point objects and I am getting the following error: OPC/OLE error. OPC server not registered properly (63). Invalid class string 800401F3.

[A.S.]

Hello,
Thanks for contacting National Instruments. There are three known reasons that you may get this error.

1. IAK file not setup or it has been moved or is missing.
This error is easy to reproduce. In order for the OPC FieldPoint Server to work, it has to launch the FieldPointOPC2.exe which has looks at a registry key for FieldPoint Explorer. In this registry key is the path to the last saved or loaded IAK file. If this file has moved or has been deleted, then you will get this error. This also happens to customers that have upgraded their FP Explorer and haven't opened up their IAK file and saved it.

2. OPCproxy is not registered. Which means the opcproxy.dll or opccomn_ps.dll are not registered or are version 1.0 (can be registered by running "regsvr32 opcprox
y.dll" and "regsvr32 opccomn_ps.dll". The opcproxy.dll and the opccomn_ps.dll are located in the system32 folder in the WINNT directory.

3.OPCserver is not registered (can be accomplished by running the .exe with a /regserver switch) . The Fieldpoint OPC server is located in the following path: [drive letter]:\Program Files\National Instruments\FieldPoint. From a DOS prompt you can manually register the EXE by going to that directory and typing FieldPointOPC2.exe /RegServer. In a dos prompt the command line looks like this (also see attached picture):


c:\cd c:\Program Files\National Instruments\FieldPoint
c:\Program Files\National Instruments\FieldPoint\FieldPointOPC2.exe /RegServer

Hope this works. If it doesn't, then I suggest that you uninstall all NI software and try to do a fresh install. This will properly ensure that all the services and servers are registered.

A Saha
Applications Engineer
National Instruments