Error when testing a Guided Procedure that use a Visual Composer UI

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Hello!

Trying to develop my first Guided Procedure in SAP NW CE 7.1 SR3.

I follow instructions that I earlier have used with CE 7.1 SP1 (in TechEd07), assuming no major changes from SP1 to SR3...

I have defined a Callable Object that is based on a Visual Composer UI.

The Visual Composer UI itself works fine when I test it in Visual Composer but when I try to test the Callable Object I get the following error message:

"Could not load execution container: Did not find active instance for component com.sap.caf.eu.gp.ui.co.wd4vc.exec.COExecWD4VC in running application."

When I click on the error message I get a lot of details of the underlying Java exception:

"java.lang.IllegalArgumentException: Cannot find view element with ID 9NEfbfuapOdP8O4KnmM19Q in application com.sap.caf.eu.gp.dt.workset.AppWorkset with namespace null"

(skipped all details...)

Have I missed some step (development or configuration) that is new in CE 7.1 SR3 compared to CE 7.1 SP1?

I have tried to read through the available on-line help but can't find anything that seems to differ...

Are there any examples/tutorials available for CE 7.1 SP3?

Thanks for your help,

Magnus.