Hello,

If i run the code as part of as an application from the desktop, all works 
ok.
If i run the code as part of as an service, all works NOT ok.
When started as a service, the last line in the logfile = "Start loading OPC 
Client".
The service is multi-thread, and all threads keep on running (exept this 
one).
I set service account to Local System account, and to administrator, same 
result.

Is seems to me as CreateObject("OPCLabs.EasyDAClient.5.1") locks completly, 
and never returns.

What am i missing here?

Regards,
Jack Duijf



::AddToLog("Start loading OPC Client")
BEGIN SEQUENCE
   ::oOpc            := CreateObject("OPCLabs.EasyDAClient.5.1")
   ::AddToLog("OPCLabs.EasyDAClient.5.1")
   ::AddToLog("LastComError: " + ComLastError() + " " + ComLastMessage())
RECOVER USING oError
   ::AddToLog("OPCLabs.EasyDAClient.5.1 is not installed")
   ::AddToLog("Fatal error: " + ComLastError() + " " + ComLastMessage())
   ::AddToLog("Xbase error: " + oError:description)
END SEQUENCE
ErrorBlock(bError)
if ValType(::oOpc) == "O"
   ::AddToLog("OPC Client loaded")
else
   ::AddToLog("OPC Client not loaded")
endif
...
The function ::AddToLog() ads a text to a logfile

Just a guess... Is it possible object "OPCLabs.EasyDAClient.5.1" try to
display something and wait for an answer?

In the service property, set a real user and put a checkmark in the box
"Allow the service to interact with the desktop".

Start a Windows session with the same user name, and run your service.
Maybe you'll see something...

Hello Pascal,

Thank you for the reply.
I did what ou suggested.

1. I tried as "Local System account", and "Allow service to interact with 
desktop"  enabled.
2. I tried as "This account", user = administrator,

There is no interaction on the screen, whatever the settings are.
I know for shure, the service starts properlty (i create a log file at 
startup).
The service Freeze on CreateObject("OPCLabs.EasyDAClient.5.1"), Processor 
utilisaion = 0%
The PC is Win-XP SP-3.
If same code is run in GUI app, all works ok.

Suggestions ar e welcome.

Regards,
Jack Duijf






"Pascal Boivin" schreef in bericht 
news:xn0hsz0drd400u000@news.alaska-software.com...
> Just a guess... Is it possible object "OPCLabs.EasyDAClient.5.1" try to
> display something and wait for an answer?
>
> In the service property, set a real user and put a checkmark in the box
> "Allow the service to interact with the desktop".
>
> Start a Windows session with the same user name, and run your service.
> Maybe you'll see something...