Message type: E = Error
Message class:  FICUSTOM - Customizable Messages for Funds Management 
Message number: 135
Message text: Prd of perform. for billing plan item &1 not within PEROP of doc. &2
The period of performance of the billing plan item does not fall within
the period of performance of the header of the sales document or does
not fall within the period of performance of the item of the sales
document.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You can determine whether a sales document number represents a header
record or an item record by evaluating the item number. For the purposes
of this message, the sales document is represented as a concatenation of
Sales and Distribution document number (field VBKD-VBELN) and item
number of the SD document (field VBKD-POSNR).The item number is set to
'000000' when the record is a header record. Also note that the billing
plan number is represented as a concatenation of billing plan number /
invoicing plan number (field FPLT-FPLNR) and item for billing
plan/invoice plan/payment cards (field FPLT-FPLTR).
Verify that billing plan item values fall within header or item period
of performance values. Adjust billing plan item values.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FICUSTOM135 indicates that there is an issue with a billing plan item not being within the permitted period of the document. This typically occurs in the context of billing and financial transactions where the billing plan item is expected to fall within a specific date range defined by the document.
Cause: The error can be caused by several factors: Billing Plan Configuration: The billing plan item may have been set up with dates that do not align with the document's validity period. Document Date Issues: The document (e.g., sales order, contract) may have a validity period that does not cover the billing plan item. Incorrect Data Entry: There may be incorrect or missing data in the billing plan or the associated document. Changes in Document: If the document was modified after the billing plan was created, it may have resulted in a mismatch.
Solution: To resolve the error, you can take the following steps: Check
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