Juan,
I have already done it, I have posted the issue in the Financial community but I am very pesimist.
It has nothing to do with table TCURR, because the IDOC data is already providing an Exchange rate. However, in one of the revenue items, if you divide EUR/GBP, it does not correspond to the exchange rate of the document. This is because in their system (AS/400), they introduce sales values from different days, but SAP is only keeping one Exchange rate at header.
When they pass the IDOC file to their SAP system (Machine A) from AS/400, their SAP does not care about that exchange rate, it only posts values, bearing in mind that the revenue account is not with a cost center (that is, is not a cost element). And all the figures are OK, in EUR and in GBP. matching the data provided in the IDOC, and not caring about the exchange rate.
But, this same scenario is not reproduced in Machine B: despite posting against a revenue account that is not a cost element (without a cost center), system is not matching values in GBP for that item that was coming with a different exchange ratio....and differs, although in EUR yes it is matched.
No, I think it has nothing to do with TCURR.
Thanks Juan for your information.
Regards
Patxi