On AS ABAP, you have to perform automatic customizing to be able to use the Business Process Engine.
Procedure
Perform the following steps in your AS ABAP system:
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Log on as user with SAP_ALL rights (you cannot use DDIC or SAP*).
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Call transaction SWF_XI_CUSTOMIZING to perform basic customizing. This transaction sets all required technical settings.
The screen Automatic Workflow Customizing appears.
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Make sure that the Maintain Runtime Environmentnode has a green check (not a red cross).
If there is a red cross, do the following:
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Select the Maintain Runtime Environment node.
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Choose Perform Automatic Workflow Customizing.
The system now performs the automatic customizing including all sub nodes.
 
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Choose
 Maintain Definition Environment 
 Maintain Prefix Numbers 
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Choose Execute.
The Prefix Numbers for Workflow and Organizational Managementscreen appears.
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Choose Display <-> Change to activate the edit mode.
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In the Available Prefix Numbers for Workflow and Organizational Management box, choose Create.
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In the dialog box, enter a Prefix numberequal to or higher than 900 and choose Save.
NOTE
You need to enter a transport request according to your Transport Management System (TMS) and choose Save again.
 
