Message type: E = Error
Message class:  FI - TR-FM Funds Management 
Message number: 185
Message text: FM area &1 &2: Currencies are different
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The SAP error message FI185 indicates that there is a currency mismatch in the context of a Funds Management (FM) area. This error typically occurs when you are trying to post a transaction that involves different currencies, which is not allowed in certain contexts within SAP.
Cause: The error message "FI185 FM area &1 &2: Currencies are different" is triggered when: You are attempting to post a transaction in a Funds Management area where the document currency does not match the FM area currency. The transaction involves multiple currencies, and the system cannot reconcile them due to configuration settings or data entry errors. The FM area is set up to only allow transactions in a specific currency, and the transaction you are trying to post is in a different currency.
Solution: To resolve this error, you can take the following steps: Check Currency Settings: Verify the currency settings for the FM area in question. Ensure that the currency used
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