Message type: E = Error
Message class:  CNV_OM_PRESEL - Messages for LT Object Based Preselection 
Message number: 175
Message text: No selected task has a status that can be cancelled
Only preselection tasks with status <ZK>running</>, <ZK>reserved</>, or
<ZK>waiting</> can be selected to send a request for cancellation.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Select preselection tasks with a suitable status to send a request for
cancellation.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_OM_PRESEL175 indicates that there is an attempt to cancel a task in the SAP system, but the task does not have a status that allows it to be cancelled. This error typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: Task Status: The most common cause of this error is that the task you are trying to cancel is not in a cancellable state. For example, tasks that are already completed, failed, or in a state that does not permit cancellation will trigger this error. User Permissions: In some cases, the user may not have the necessary permissions to cancel the task, although this is less common for this specific error. System Configuration: There may be specific configurations or settings in the system that restrict the cancellation of certain tasks.
Solution: Check Task Status: Review the status of
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_OM_PRESEL174 No selected task has a status that can be aborted
What causes this issue?  Only preselection tasks with status <ZK>running</> can be aborted.System Response  The system issues an error mes...
CNV_OM_PRESEL173 No RFC destination to sender
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_OM_PRESEL200 The selected table is not valid
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_OM_PRESEL201 No authorization to view original table &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.