Error of TooManyObjectsException caught in 9.0.2 but not in 9.0.3

Question

After I know the JDeveloper version 9.0.3 is available, I download it and tried to run my application which was developed with version 9.0.2. However, I encountered several problems, one of which is stated as below:
In class Entity1 source code, I place the following codes as validation:
protected void createDef() {
super.createDef();
addUniquePKValidation();
and In the implementation interface of Entity1, I have the following codes:
protected void doInsertEntity1Row() {
try{
r.setObject1Id(strObject1Id); // Suppose Object1Id is the primary key
} catch (TooManyObjectsException) {
With release 9.0.2, it works fine that the TooManyObjectsException can be caught when a row with the same primary key. However, in 9.0.3, the error is skipped and is caught only when the commit statement is executed and posting error is generated.
Please reply what's going on with 9.0.3 about my mentioned scenario and advice me for corresponding solution.
Thank you!

Answer 1

Thank you for your reply.
I have checked corresponding xml file and found the following differences for a sample entity:
1) Encoding
902> <?xml version="1.0" encoding='ISO-8859-1'?>
903> <?xml version="1.0" encoding='windows-1252'?>
2) Version attribute
902> <Attr Name="_version" Value="9.0.2.7.94" />
903> <Attr Name="_version" Value="9.0.3.10.7" />
3) Timestamp
902> TimeStamp="1028878016109"
903> (N/A)
4) Precision of all columns have been added for all columns.
Sample xml files difference for the same view:
1) Encoding
902> <?xml version="1.0" encoding='ISO-8859-1'?>
903> <?xml version="1.0" encoding='windows-1252'?>
2) Version attribute
902> <Attr Name="_version" Value="9.0.2.7.94" />
903> <Attr Name="_version" Value="9.0.3.10.7" />
3) Timestamp
902> TimeStamp="1028878016109"
903> (N/A)
4) Message bundle class definition
902> (N/A)
903> MsgBundleClass="oracle.jbo.common.JboResourceBundle"
5) Column type definition
902> (N/A)
903> ColumnType="$none$"
By the way, I would like to specify that my first set of source code fragment of Entity1 is extracted from the definition file.
Thanks for your attention and replies!