Datagrid Error

[Marty Knapp]

I have an application with a Datagrid that's been working fine but I'm 
now getting an error in the standalone (but it seems to work fine in the 
IDE):

Software Version: 2.1.0r1
System: MacOS 10.6.8
Executing at 6:01:45 PM on Tuesday, September 27, 2011
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Type: Chunk: can't find object
Object: button "Data Grid" of group "Behaviors" of card "card id 1002" 
of stack "revDataGridLibrary"
Line: if the behavior of it is empty then
Line No: 3729
Hint: _table.CreateControlsForColumns
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Type: if-then: error in statement
Object: button "Data Grid" of group "Behaviors" of card "card id 1002" 
of stack "revDataGridLibrary"
Line: if theRequiredControlCount > theCurrentControlCount then
Line No: 3642
Hint: _table.FillListWithJustEnoughControls
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Type: Handler: error in statement
Object: button "Data Grid" of group "Behaviors" of card "card id 1002" 
of stack "revDataGridLibrary"
Line: _table.FillListWithJustEnoughControls
Line No: 3788
Hint: _table.DrawControlsInRealTime
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Type: Handler: error in statement
Object: button "Data Grid" of group "Behaviors" of card "card id 1002" 
of stack "revDataGridLibrary"
Line: _table.DrawControlsInRealTime pForceRefresh
Line No: 3480
Hint: _table.DrawWithProperties
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Type: switch: error in statement
Object: button "Data Grid" of group "Behaviors" of card "card id 1002" 
of stack "revDataGridLibrary"
Line: switch _ControlType()
Line No: 2302
Hint: _DrawListWithProperties
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Anybody have a clue what's going on???

Marty Knapp