How To Fix STC_TASK023 - Attributes for ABAP class &1 have changed incompatibly

SAP Error Message - Details

• Message type: E = Error

• Message class: STC_TASK - Task related Messages

• Message number: 023

• Message text: Attributes for ABAP class &1 have changed incompatibly

What causes this issue?

ABAP class &V1& has been changed incompatibly after the current task
list run or variant has been created. This means that the definition of
class attributes has changed (e.g. from a character like type to an
integer like type) and the task in the current task list run/variant
already contains values which does not fit to the current type.

System Response

In case the corresponding task has not been executed already, it will be
skipped. If the task has been executed, the execution status and the
task log remains.

How to fix this error?

The reason for changing the parameters incompatibly is only known by the
task developer (task owner). It is very likely that this is a wanted
behavior and cannot be reverted.
If you create a new task list variant/run using this task the error will
disappear. Within the current task list run or variant the task cannot
be recovered.

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.