Error message upon launch of IB3

Thought you should know I keep getting the error message below when I launch IB3. Not sure why.  Happens intermittently.  Thanks for looking into this and suggesting a possible solution.

Char

InteractBuilder Version: 3.3 Build 325
Device: MacBook Pro
Processor: Intel Core i7
Memory: 4 GB
System: 10.7.5
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An application error occurred while attempting to perform the last action.
Restarting InteractBuilder is recommended.
An application error occurred while attempting to perform the last action.
Restarting InteractBuilder is recommended.
Error: Chunk: no such object / hide: can't find object
Handler: UpdateDB
Hint: ProgressAction
Location: Line 1814, char 4
Object: button id 1007 of group id 1010 of card id 1002 of stack "Behaviors" of stack "/Applications/InteractBuilder.app/Contents/MacOS/Local Components/Data/InteractBuilder.livecode"
89: Line 1814 at char 4: Chunk: no such object ----> ProgressAction
246: Line 1814 at char 1: hide: can't find object
241: Line 1814 at char 1: Handler: error in statement ----> UpdateDB
353: Line 0 at char 0: Object Name: ----> button id 1007 of group id 1010 of card id 1002 of stack "Behaviors" of stack "/Applications/InteractBuilder.app/Contents/MacOS/Local Components/Data/InteractBuilder.livecode"
573: Line 748 at char 1: Handler: can't find handler ----> UpdateDB
253: Line 747 at char 1: if-then: error in statement
253: Line 746 at char 1: if-then: error in statement
253: Line 723 at char 1: if-then: error in statement
253: Line 719 at char 1: if-then: error in statement
587: Line 712 at char 1: switch: error in statement
241: Line 712 at char 1: Handler: error in statement ----> LoadApp
353: Line 0 at char 0: Object Name: ----> button id 1007 of group id 1010 of card id 1002 of stack "Behaviors" of stack "/Applications/InteractBuilder.app/Contents/MacOS/Local Components/Data/InteractBuilder.livecode"
573: Line 62 at char 1: Handler: can't find handler ----> LoadApp
253: Line 55 at char 1: if-then: error in statement
253: Line 54 at char 1: if-then: error in statement
253: Line 51 at char 1: if-then: error in statement
253: Line 47 at char 1: if-then: error in statement
253: Line 43 at char 1: if-then: error in statement
253: Line 40 at char 1: if-then: error in statement
241: Line 40 at char 1: Handler: error in statement ----> mouseUp
353: Line 0 at char 0: Object Name: ----> button id 1020 of stack "Behaviors" of stack "/Applications/InteractBuilder.app/Contents/MacOS/Local Components/Data/InteractBuilder.livecode"
line 150 of handler "errorDialog" of button "stsErrors_FS" of card id 1002 of stack "libSTSErrors"
line 14245 of handler "DoError" of stack "InteractBuilder" of behavior button "Stack B" of card id 1002 of stack "Behaviors"