Hello Laura,
Where were you using 3 decimal places in ACCPAC? Standard Accpac Plus only supported 2 decimal places in pricing and costng. There was an add-on (Increased Decimal Places) that allowed more decimal places in Accpac Plus.
Adagio supports up to 6 decimal places in selling price, but only 2 decimal places (pennies) in costing. You need to use alternate units of measure for the increased precision.
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Andrew Bates