Message type: E = Error
Message class:  CNVHCM_PRESEL - TDMS4HCM: Messages for Object Selection 
Message number: 203
Message text: Save changes to criteria and objects first; action is not possible
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNVHCM_PRESEL203 typically occurs in the context of the SAP HCM (Human Capital Management) module, particularly when working with the "Preselection" functionality in the SAP system. This error indicates that you are trying to perform an action that requires you to save your changes to the criteria and objects first.
Cause: The error is triggered when: You have made changes to selection criteria or objects in a transaction or report but have not saved those changes. You attempt to execute an action (like running a report, processing data, etc.) without saving the current state of your selections.
Solution: To resolve this error, follow these steps: Save Your Changes: Look for a "Save" button or option in the interface. Make sure to save any changes you have made to the selection criteria or objects. Re-attempt the Action: After saving, try to perform the action again that triggered the error. Check for Required Fields: Ensure that all required
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNVHCM_PRESEL202 Specify consistent selection criteria; saving is not possible
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVHCM_PRESEL201 Selection criteria are consistent
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVHCM_PRESEL204 Save changes to criteria first; action is not possible
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVHCM_PRESEL205 Save changes to objects first; action is not possible
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.