SAP Message VAL012 - No components for valuation not affecting P/L

Diagnosis
You want to perform a &V1& using procedure &V2& for a position. Thisprocedure is defined so that gains/lossses are not realized. In thiscase, separate components are used in the subledger for valuations thatdo affect gains and loss. However, these do not exist for thisposition.
This situation can occur only if, in the productive system, procedureV2 was changed so that it contains the setting do not realizeGains/Losses that it did not contain when the position wasgenerated. This change to the Customizing is not permitted.

System Response
The activity is canceled.

Procedure
Correct the settings in procedure &V2&. If you want to have componentsthat do not effect gains/losses for the position, you have to transferthe valuation class or the securities account. In doing so, make surethat the appropriate settings are made for the position managementprocedure of the target position.