Hi,
Here is a scenario to reproduce this bug :
Add a TmyQuery , name it master.
Fill the SQL property.
Add a Datasource and link it to the master query.
Left Click on the master Query , select field editor and retreive all fields (CTRL L)
Add a TmyQuery, name it Details
Fill the SQL property.
Add a Datasource and link it to the details query.
Left Click on the details Query , select field editor and retreive all fields (CTRL L)
Fill the MasterSource property
Fill the Master / Design key
That will works fine.
Now modify the SQL statement from the Details Query. Just add a new field. Validate the changes.
Left Click on the details Query , select field editor and retreive all fields (CTRL L) => You will get the List Out Of Bound (2) 
The solution to "bypass" this is to clear the Master/Detail key and then add the new persistent field...
Can anybody else test this ?
Thanks...
B.R.
Stephane Wierzbicki
Ps : BDS 2006 + Update 2 + Hotfixes 1 to 6
			
									
									
						List Index Out Of Bounds (2) with myDAC 4.30.11.15 (during Design time) with Master Details Query and Persistent fields
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				swierzbicki
 - Posts: 451
 - Joined: Wed 19 Jan 2005 09:59
 
We think that this problem is similar to problem mentioned in the topic "#42000 : you have an error in your SQL syntax... near '?' at line x error with myDAC 4.30.11.15 (design time)".