Message type: E = Error
Message class:  CMM_MEV_GEN_WL - Period-End Valuation: Worklist 
Message number: 013
Message text: Enter a valid posting date and reset date
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The SAP error message CMM_MEV_GEN_WL013 indicates that there is an issue with the posting date and reset date in the context of a specific transaction or process, typically related to the management of materials or inventory. This error usually arises when the dates entered do not meet the required criteria set by the system.
Cause: Invalid Posting Date: The posting date entered is either in the past or future, which is not allowed based on the configuration or business rules. Reset Date Issues: The reset date may not be aligned with the posting date or may also be invalid. Date Format: The date format may not be recognized by the system, leading to an error. Authorization Issues: The user may not have the necessary permissions to post on the specified dates. Configuration Settings: There may be specific settings in the configuration that restrict the posting dates based on the fiscal year or period.
Solution: Check Dates: Ensure that
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