Diagnosis
You have entered a generation period for the external capazitythat is smaller than the generation period of the resource in SAP APO.
The generation period for the available capacity of a resource in SAPAPO is defined using the Validity in theFuture of the Validtiy in the Past.
You specify the validity period of the external capacity usingthe settings in CIF Customizing. If you have not entered a value there,the system generates the external capacity for 30 days in thepast and 600 days in the future.

Procedure
Define the generation period for the external capacity so thatit is at least as large as the generation period of the availablecapacity in SAP APO.