How To Fix CY017 - Error when determining the posting period

CY017 - Overview

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 017

• Message text: Error when determining the posting period

What causes this issue?

As the period type, you selected "posting periods". This means that a
date must be converted to a posting period. However, this entry is
not contained in the fiscal year variant table.

System Response

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

How to fix this error?

Enter a valid posting period (according to the fiscal year variant
table) or a valid date.

Error message extract from SAP system. Copyright SAP SE.

CY017 - Details

• The SAP error message CY017, which states "Error when determining the posting period," typically occurs during the posting of transactions in SAP, particularly in the context of controlling (CO) or financial accounting (FI). This error indicates that the system is unable to determine a valid posting period for the transaction being processed.
  Causes of CY017 Error
  
  
  Closed Posting Periods: The most common cause is that the posting period for the transaction date is closed. This can happen if the period has been closed in the financial settings.
  
  
  Incorrect Configuration: There may be issues with the configuration of the posting periods in the controlling area or company code settings.
  
  
  Date Mismatch: The date of the transaction may not fall within the allowed posting periods defined in the system.
  
  
  Authorization Issues: Sometimes, users may not have the necessary authorizations to post in certain periods.
  
  
  Fiscal Year Variant Issues: The fiscal year variant assigned to the company code may