FinancialStatementRows - mandatory fields
A value must be supplied for:
- 
                              			            
                              
Line Code - payload element
<VSsrfmscSln_SlnLineCode> 
except for the Query method, where it is optional.
In addition, if creating or amending Financial Statement Line data, or using the DeleteChildData method, then:
- 
                              			            
                              
Line Number - payload element
<StatementLine.VSsrfmscSln_SlnLineNo> 
must be supplied.