I m executing in script editor tell application "FileMaker Pro" open file "TIGER:TestingData.fp7" with passwords "admin" for Accounts "Admin" end tell & it is running successfully. But when I try to run above code in cocoa using NSApplescript & NSAppleEventDescriptor class as follows: NSAppleScript *scriptObject = [[NSAppleScript alloc] initWithSource: @"tell application \"FileMaker Pro\" open file \"Tiger:TestingData.fp7\" with passwords \"admin\" for Accounts \"Admin\""]; NSAppleEventDescriptor *returnDescriptor = [[NSAppleEventDescriptor alloc] init]; returnDescriptor scriptObject executeAndReturnError: &errorDict]; [scriptObject release]; but when I run above code, I get descriptorType of returnDescriptor as kAENullEvent & thats why file doesn't get open. What can be the solution? Thanks, Palav