Your issue is a combination of workflow binding configuration and status transition validation timing. Let me walk through the complete solution:
Status transition validation in work order workflows operates at multiple levels. First, verify the status profile in transaction BS22 - ensure status PLAN has allowed successor status REL defined. However, your error message indicates the profile is correct but field-level validation is failing.
Required field configuration for work orders is defined in multiple places. Check transaction OIBS where you configure field selection for work order types. Work center must be marked as required entry for your specific work order type and status combination. The critical setting is in field selection group - if work center is optional in PLAN status but required in REL status, the validation will fail at transition point.
Workflow tracing reveals the actual issue - the validation method check_required_fields executes BEFORE the workflow container values are committed to the work order object. This is a common workflow timing problem. In SWDD, examine the workflow step that performs status transition. The step likely looks like:
CALL METHOD bo.set_status
EXPORTING status = 'REL'
EXCEPTIONS validation_failed = 1.
The problem is the workflow container holds the work center value, but the business object method validates against the persisted work order, not the container. You need to ensure work center is saved BEFORE status transition:
CALL METHOD bo.update_fields
EXPORTING work_center = wf_container-work_center.
CALL METHOD bo.save.
CALL METHOD bo.set_status
EXPORTING status = 'REL'.
Work order type setup in IA04 controls default values and field properties, but doesn’t directly affect workflow validation. However, verify the order type has proper operation control key assigned - some validation logic checks for valid operation before allowing status changes.
Workflow tracing configuration: Enable trace level 3 in SWU3 for detailed method call logging. Look specifically for the sequence of method calls when status transition fails. You should see field validation methods executing before status update methods. The trace will show which field validation is actually failing and what value it’s checking against.
To fix permanently: Modify your workflow in SWDD to add an explicit save step before status transition. In the workflow step binding, ensure all required fields (work center, operation, etc.) are mapped from workflow container to business object attributes. Add error handling that provides specific feedback about which required field is missing. Consider adding a workflow step that validates all required fields are populated in the container before attempting status transition - this gives better error messages to users.
Additional check: Some implementations have custom function modules or BAdIs that perform additional validation during status transitions. Check enhancement spot WORKORDER_UPDATE and BAdI definition BADI_WORKORDER_UPDATE for any active implementations that might be adding extra validation logic. If custom code exists, ensure it’s checking the correct field values and not introducing false validation failures.
This draft is based on general SAP S/4HANA knowledge. It has not been verified against your specific version and environment. Practitioners: verify the steps and share your experience below.