The successor reqmts groups of the ATP tree structure were not converted

What causes this issue?

The following errors occurred during the conversion of ATP tree
structures:
The system could not create a simulation version
The system could not convert successor requirements groups

System Response

The system terminates the conversion of the ATP tree structures and
restores the planning situation that existed before the start of the
conversion.

How to fix this error?

Check
If the connection to SAP liveCache was lost
If further errors regarding the terminated conversion were noted in the
planning log
Try to remove the errors and restart the ATP check for the affected
sales order or sales order item.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.