2101312 - Error Occurred While Trying to Evaluate Condition of a Process Step

One of the sequence error occurs while trying to post any Purchasing document.

• Document not submitted for approval; inconsistencies exist
• Exchange Rate for and for Rate Type does not exist for
• Error occurred while trying to evaluate condition of a process step
• Affected process: " / step "

 or

• Posting not possible; clarify exceptions first.
• Error occurred while trying to evaluate condition of a process step.
• Exchange Rate for ABC and DEF for Rate Type 001 does not exist for YYYY.MM.DD (ABC refers to a currency, DEF refers to the supplier invoice currency, YYYY.MM.DD refers to date).

SAP Business ByDesign

Purchase Order, Supplier Invoice, Approval Process, exchange rate, Document not submitted for approval, Inconsistencies exist, Error occurred while trying to evaluate condition of a process step, Affected process: " / step ", Posting not possible; clarify exceptions first , KBA , AP-PRP , Purchase Request Processing , AP-POP-PO , Purchase Order , AP-SIP , Supplier Invoice Processing , AP-GSP , Goods and Service Acknowledgement , How To