How To Fix WL855 - Date & is not valid (plausibility check not fulfilled)

WL855 - Overview

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 855

• Message text: Date & is not valid (plausibility check not fulfilled)

What causes this issue?

The date specified is invalid. It contains:
invalid characters (such as letters)
an invalid date unit (such as a month greater than 12 or more days than
the month contains).

System Response

The action was cancelled.

How to fix this error?

Enter a valid date. Please observe the validity criteria specified
above.

Error message extract from SAP system. Copyright SAP SE.

WL855 - Details

• The SAP error message WL855, which states "Date & is not valid (plausibility check not fulfilled)," typically occurs in the context of logistics or production planning when the system detects that a date entered does not meet certain predefined criteria or checks. This error is often related to the scheduling of operations, availability of resources, or other date-related validations in the system.
  Causes:
  
  Invalid Date Format: The date entered may not be in the correct format expected by the system.
  Date Out of Range: The date may fall outside of the permissible range defined in the system settings (e.g., past dates, dates beyond the planning horizon).
  Plausibility Checks: The system has built-in checks to ensure that the date aligns with business rules, such as lead times, production schedules, or resource availability.
  Calendar Settings: The date may conflict with non-working days or holidays defined in the factory calendar.
  
  Configuration Issues: There may be issues with the configuration