Message type: E = Error
Message class:  HRPAYAT_0526 - Messages in Area for Master Data (Austria) IT 0526 
Message number: 400
Message text: 4** All messages of infotypes SI reg./dereg./change notifications from 5O
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 HRPAYAT_0526400 typically relates to issues with the processing of infotypes in the context of payroll, particularly concerning the registration, deregistration, or change notifications for social insurance (SI) in the HR module. This error can occur when there are inconsistencies or issues with the data being processed for employees in relation to their social insurance records.
Cause: Data Inconsistencies: The error may arise due to missing or incorrect data in the infotypes related to social insurance. Infotype Configuration: There may be issues with the configuration of the infotypes, such as incorrect settings or missing entries. Timing Issues: The error can occur if the notifications are being processed at an incorrect time, such as outside of the allowed period for changes. Authorization Issues: Lack of proper authorization to access or modify the relevant infotypes can also lead to this error.
Solution: Check Infotype Data: Review the relevant infotypes (e.g., IT 0000, IT 0001, IT 0002,
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPAYAT_0526101 Value & in the increase due to seniority field in table T5A4A not allowed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYAT_0526009 Field &1 (&2) must not be initial due to ELDA
What causes this issue?  The infotype field &V1& (&V2&) is initial. However, the corresponding field in the ELDA notification is defin...
HRPAYAT_0526401 Enter workdays using days vector or manually
What causes this issue?  You have selected individual weekdays in the <ZH>Working Days</> group box and also entered a value in the <LS...
HRPAYAT_0526402 Work relationship was not ended: no further data required
What causes this issue?  You have not selected the <LS>Work Relationship Was Ended</> field, but you have entered data about the <LS>...
Click on this link to search all SAP messages.