How To Fix VHURL303 - Predecessor already has a successor transmission

VHURL303 - Overview

• Message type: E = Error

• Message class: VHURL - Messages for Returnable Packaging Account Processing

• Message number: 303

• Message text: Predecessor already has a successor transmission

What causes this issue?

The predecessor (<ZH>&V1&</>) entered for the current transmission
already has a successor.

System Response

Inbound processing terminated in mode <LS>In the background</>.
However, further processing is possible in mode <LS>In the foreground
</>.

How to fix this error?

Check that the IDoc is correct.
In the workflow inbox, enter a correct transmission number in the IDoc
field <LS>TRMOLD</> (Segment: <LS>E1EDK40</>). This number must not yet
have a successor transmission number in the table <LS>TRNSM</> with
reference to the following parameters:
- PartnerNo, PartType, PartRole : <ZH>&V2&</>
- Log.Message, MessVar, MessFct : <ZH>&V3&</>
- Direction, Test : <ZH>&V4&</>
Start inbound processing again (in the background).
Alternatively, you can process the IDoc unchanged in mode <LS>in the
foreground</> (online).

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

If you do not want inbound processing to terminate as a result of the
external transmission number consistency check, set <LS>automatic
processing allowed</> in Customizing.

Error message extract from SAP system. Copyright SAP SE.

VHURL303 - Details

• The SAP error message VHURL303: Predecessor already has a successor transmission typically occurs in the context of the SAP Vehicle Scheduling (VS) or Transportation Management (TM) modules. This error indicates that there is an attempt to create a successor transmission for a predecessor that already has an existing successor. 
  
  Cause:
  
  Existing Successor: The predecessor transmission already has a successor assigned to it. In SAP, each predecessor can only have one successor, and trying to assign another will trigger this error.
  Data Integrity Issues: There may be inconsistencies in the data or configuration that lead to this error, such as incorrect transmission settings or misconfigured relationships between transmissions.
  User Error: The user may be attempting to create a new transmission without realizing that the predecessor already has a successor.
  
  
  Solution:
  
  Check Existing Successors: Review the predecessor transmission to see if it already has a successor. You can do this by navigating to the relevant transaction or