How To Fix PSSC_CONTR018 - Net calculation simulation failed while building net calculation units

SAP Error Message - Details

• Message type: E = Error

• Message class: PSSC_CONTR - Messages for application controller

• Message number: 018

• Message text: Net calculation simulation failed while building net calculation units

What causes this issue?

Net calculation simulation failed while mapping the selection criteria
to net calculation units.

System Response

The result of the net calculation simulation cannot be determined.

How to fix this error?

Additional messages should allow you to find out the reason of the
failure. If required, contact your system administrator for support.
Net calculation simulation is organized in the following steps:
Mapping of the selection criteria to net calculation units
Net calculation units are the data format used for net calculation
execution and queries.
Gross entitlement and gross payment determination
If required, the entered or changed SSP or SDP data is handled by gross
entitlement and gross payment determination. As a result, a gross
payment document (GPD) is created but not stored in the database. The
GPD is handed over to the next processing step.
Net calculation execution (simulation only)
If a new GPD is available, the net calculation is processed for it.
Query of result
A query is executed to provide the net calculation result for the
entered selection criteria. The data is fetched from the database but
the net calculation result of the prior step is included, if it exists.
If no entered or changed SSP or SDP data is provided, the result of the
net calculation simulation displays the database content. This is the
net calculation result that reflects the current status regarding the
billing process.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PSSC_CONTR018 - Net calculation simulation failed while building net calculation units ?

  The SAP error message PSSC_CONTR018 indicates that there was a failure during the net calculation simulation while building net calculation units. This error typically occurs in the context of SAP's Contract Management or similar modules where net calculations are performed for contracts, pricing, or financial transactions.
  Causes:
  
  Data Inconsistencies: There may be inconsistencies or missing data in the contract or related master data that are required for the net calculation.
  Configuration Issues: Incorrect configuration settings in the pricing procedure or net calculation settings can lead to this error.
  Missing Master Data: Required master data (like customer, vendor, or material data) may be missing or incorrectly maintained.
  Calculation Logic Errors: There may be issues in the calculation logic defined in the system, such as incorrect formulas or conditions.
  Authorization Issues: The user may not have the necessary authorizations to perform the net calculation.
  
  Solutions:
  
  Check Data Consistency: Review the contract and related master data for any inconsistencies or missing information. Ensure that all required fields are filled out correctly.
  Review Configuration: Check the configuration settings for the pricing procedure and net calculation. Ensure that they are set up correctly according to business requirements.
  Validate Master Data: Ensure that all necessary master data is available and correctly maintained. This includes checking customer, vendor, and material records.
  Debug Calculation Logic: If you have access to the system's development environment, consider debugging the calculation logic to identify any issues in the formulas or conditions.
  Check Authorizations: Verify that the user has the necessary authorizations to perform the net calculation. If not, work with your SAP security team to grant the required permissions.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message. There may be patches or updates available that resolve known issues.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE80 (Object Navigator) or SE37 (Function Module) to analyze the related function modules or programs that handle net calculations.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review SAP documentation related to contract management and net calculations for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.