>Hilmar,
>
>This is exactly what I have done, simply automating excel to access the functions, in this case NORMSINV(x), works fine if a little slow.
OK.
According to the description I found in help - if I have the correct function, for I use Excel in Spanish - the function uses an iterative process.
If you know what normsinv() is the inverse of, you might do something similar in a UDF. This might run faster than Excel Automation.
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