As an ex-Systems Analyst and Programmer - whenever you approach the need to replace any system...the first prerequisite is to ensure that any New system..must have the Same function as any Old system....and to always remember that the Old systems functionality generally actually works..!! In most case, if a system needs to be changed - it is for Technical reasons Not Functional reasons. Either that or the Old system is No Longer needed by it's users. Therefore....in designing the New system..the functionality MUST be fully understood by those who are to write the New system... Is this the case here...?? Tim Radford
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