Message type: E = Error
Message class:  /SAPAPO/DMRES -  
Message number: 034
Message text: Enter either begin and end or "after hours" and duration for a break
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 /SAPAPO/DMRES034 typically occurs in the context of SAP Advanced Planning and Optimization (APO) when you are trying to define a break in a planning or scheduling scenario. This error indicates that the system requires specific input parameters to define a break, and it is not receiving the necessary information.
Cause: The error message is triggered when: You have not entered the required fields for defining a break in the planning process. The system expects either a start time and end time for the break or an "after hours" duration, but neither has been provided. There may be a configuration issue or a missing entry in the relevant planning table.
Solution: To resolve this error, you should ensure that you provide the necessary information for the break. Here are the steps you can take: Enter Break Details: Go to the relevant screen where you are defining the break. Ensure that you fill in either: Begin and End Time:
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/DMRES033 Resource & 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...
/SAPAPO/DMRES032 Quantity/rate definition & 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...
/SAPAPO/DMRES035 Shift sequence & is still being used
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/DMRES036 Shift definition & is still being used
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.