Message type: E = Error
Message class:  HRPAYUS_CLD_BSI - Message Class for BSI TaxFactory SaaS Integration 
Message number: 027
Message text: Mandatory parameters are missing
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 HRPAYUS_CLD_BSI027: Mandatory parameters are missing typically occurs in the context of payroll processing, particularly when using the BSI (Business Software, Inc.) tax calculation software integrated with SAP. This error indicates that certain required parameters for the payroll calculation are not being provided, which prevents the system from processing payroll correctly. Causes: Missing Configuration: Required configuration settings in the payroll or BSI system may not be set up correctly. Incomplete Master Data: Employee master data may be incomplete or missing necessary information, such as tax information, addresses, or other relevant details. Incorrect Payroll Schema: The payroll schema may not be configured to include all necessary parameters for the calculation. Missing Infotypes: Certain infotypes (e.g., infotype 0001 for organizational assignment, infotype 0002 for personal data, etc.) may not be filled out completely for the employee. BSI Parameters: Specific parameters required by the BSI system for tax calculations may not be provided or may be
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPAYUS_CLD_BSI026 You are deleting entries with status other than '3'(Pull Successful)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYUS_CLD_BSI025 Entry for &1 - &2 - &3 with status &4 has been deleted
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYUS_CLD_BSI028 Timestamp format is wrong
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYUS_CLD_BSI029 Status value 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...
Click on this link to search all SAP messages.