I converted an Access 97 .mdb to Access 2000.<br><br>Some of the queries used the Left() function to exctract data. (i.e. IIF(Left(Organization,2) = "AB",Left(Org, 2), Left(org, 4)).<br><br>The following error message occurs when the query attempts to run "Undefined function "Left()" in expression".<br><br>A similar message is displayed when a query that employs the UCase function is run.<br><br>Both of these functions are still available in Access 2000. (I checked the help).<br><br>What is causing the "Undefined function" message to be displayed and is there a fix for this error?