Message type: E = Error
Message class:  PPESTATUS - Messages: iPPE Status Management 
Message number: 301
Message text: Selection only possible using interval and single value
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 PPESTATUS301 indicates that a selection can only be made using intervals or single values in the context of a specific operation, typically related to planning or production processes in SAP's PP (Production Planning) module. This error often arises when users attempt to make selections that do not conform to the expected input format.
Cause: The error is usually caused by one of the following reasons: Invalid Selection Criteria: The selection criteria provided do not match the expected format. For example, if the system expects a range (interval) or a single value but receives a different type of input (like a list of multiple values).
Configuration Issues: There may be configuration settings in the system that restrict the types of selections that can be made. User Input Error: The user may have inadvertently entered multiple values or an incorrect format in the selection fields.
Solution: To resolve the PPESTATUS301 error, you can take the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
PPESTATUS300 ************** Status cockpit******************
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PPESTATUS252 Person responsible & does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PPESTATUS302 Selection only possible using template and single value
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
PPESTATUS303 Select at least one field in the workflow area
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.