You will receive the above error when there is no default rounding analysis code setup for the currency, or a refresh is required where X is the currency code.
Please use the following steps to correct the rounding analysis.
Login to Dimensions
Click System
Choose Currency
Click Currencies
Choose £ (or any other relevant currency if you are getting the same error)
Please make sure P/L Rounding exists
Click Defaults at the top menu under records.
If the default does not exist: Click Edit and enter the correct analysis code.
If the default does exist: Clear the final character and tab out to allow it to be re-selected from the lookup list.
Click Save.
Once you make sure the correct analysis codes exist, then you should be able to allocate it without any error.