Wincc Unified: Calling js Function from Screen and Scheduled Task

The atached js script works fine when calling from a screen ("Click right mouse button") but returns

a error when calling from Scheduled Tasks ( T10s ). It return the following error in the Trace Viewer:

FUNCTION_CALL Invoke failed (id=1, function='HMIRuntime->Database->CreateConnection', error=80000004)

Why could this happen?

Thanks in advance

Hello, sorry I can't help you because i cannot even connect to a database, I've tried several ODBC 32 and 64 bit Drivers but I always get errors executing the instruction:

HMIRuntime.Database.CreateConnection(connectionstring);

No documentation, no examples, it's really a shame.... i'm seriously thinking to go back to WinCC 7.5, too difficult work this way.

Best Regards

Max

I don't know if it will help the original poster (I haven't tried using DB functions from within the scheduler), but I wrote up an example of doing PostgreSQL database access for a client.  The example and documentation is at https://tsuoad.box.com/s/k30wlbu49tlk1x7y2wnusvwjwelkrghr.  This may be helpful in getting started with using the WinCC Unified DB objects and methods.

My first thoughts on the screen vs. scheduler issue is to check to make sure that the function being called from the scheduler is declared as "Asynchronous".  The DB methods complete asynchronously, so would throw errors when setting up the callback if the function were trying to run synchronously.  The next thing I would look at is whether there are any value/object persistence issues.  A screen has a number of objects that persist as long as the screen is displayed.   The scheduler generally does not persist objects between execution events.

Hi hansbenkel1962,

I have same problem. Can you solve the problem?

Best Regards

Mawin.

This issue is fixed in V16 Update 3. Get it here:

https://support.industry.siemens.com/cs/ww/en/view/109773716

Hello

I have got the same problem in V17 Upr.1 The same project was running with V16 Upd.3 without problem. But after upgrading to V17 Upd.1, this error comes each time when i execute a StartProgram function, that should execute an exe file.

Did you find a solution in the meantime?

I have the same problem with WinCC UNIFIED v19

Call stack:

at [Task_ContadorAlarmas_Update] (/global_modules/ScheduledTasks.js:147:15)

| subs_DCDC.Start();

|----------------^

Anybody know the solution??