This bug was originally marked as duplicate of bug 168637, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.

Build: NetBeans IDE 6.9 (Build 201011082200)
VM: Java HotSpot(TM) Client VM, 17.0-b16, Java(TM) SE Runtime Environment, 1.6.0_21-b06
OS: Linux

User Comments:
GUEST: error creating jpa entity  on postgresql database, the column datatypes are postgresql  domains .
perhaps jpa can't translate domain name to datatype

GUEST: i was generating Entity Classes from Database using the Wizard

GUEST: Creando las clases de persistencia de mi BD

GUEST: Trying to generate POJO from a database

GUEST: This error when i create new CMP Entity Beans From Database

GUEST: I try to create CMP Entity Bean from Database use JDBC-ODBC Bridge. After Add Table and Finish, I can't create CMP Entity Bean because this error

bmm: Generating Classes from Database

GUEST: I was creating entity clasess from a Postgres database

orejas: jpa entity class wizard can't translate postgresql domain to data type.
example
create domain codigo as integer;
create domain campotexto as varchar(40);
create table prueba (
campo1 codigo constraint prueba_key primary key,
campo2 campotexto);

GUEST: create entity classes with mssql2005 std

GUEST: create entity from data base

GUEST: generating a Java Persistance class from a schema

GUEST: Auto generate entity classes from a SQL Server 2005 Express database.

GUEST: Creating a class from a database table

netbeans2008: When I tried to create entities from database, this exception happend for almost 60%-70% of the tables; therefore, no entities created. Furthermore, if I select multiple tables at a time to generate multiple entities, it never works.

OS: Vista
Database: SQL Server 2008 
 Network: LAN

jrhall3: I was creating persistence classes classes from sqlserver database tables

keeperlink: I was trying to create JPA entity class on table from SQL server.

Below is the table structure:

CREATE TABLE [dbo].[cardque] (
	[merchant_number] [int] NOT NULL ,
	[sales_order_number] [int] NOT NULL ,
	[c] [varchar] (30) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
	[requesting_user] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
	[date_created] [datetime] NOT NULL ,
	[rowguid]  uniqueidentifier ROWGUIDCOL  NOT NULL 
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[cardque] WITH NOCHECK ADD 
	CONSTRAINT [PK_cardque] PRIMARY KEY  CLUSTERED 
	(
		[merchant_number],
		[sales_order_number],
		[requesting_user],
		[date_created]
	)  ON [PRIMARY] 
GO

ALTER TABLE [dbo].[cardque] WITH NOCHECK ADD 
	CONSTRAINT [DF_cardque_c] DEFAULT ('') FOR [c],
	CONSTRAINT [DF_cardque_requesting_user] DEFAULT ('') FOR [requesting_user],
	CONSTRAINT [DF_cardque_date_created] DEFAULT (getdate()) FOR [date_created],
	CONSTRAINT [DF__cardque__rowguid__20AFFFE7] DEFAULT (newid()) FOR [rowguid]
GO

 CRE

GUEST: Problem during generation Entity Classes from MS Access database (latest HXTT driver). With full recreation information

GUEST: can't generate classes from database !

GUEST: java.lang.IllegalArgumentException: aType == null cannot create entity class from database

GUEST: jpa can't translate postgresql domain to datatypes

lmingoti: I was using the "Create entities from database" wizard.

jkak: Creating EntityBeans from Database

GUEST: postgresql entities

ikhwanma@gmail.com: error during generating entity classes. using mssql2005 std database.




Stacktrace: 
java.lang.IllegalArgumentException: aType == null
   at org.netbeans.modules.j2ee.persistence.entitygenerator.EntityMember.setMemberType(EntityMember.java:252)
   at org.netbeans.modules.j2ee.persistence.entitygenerator.DbSchemaEntityMember.setPrimaryKey(DbSchemaEntityMember.java:127)
   at org.netbeans.modules.j2ee.persistence.entitygenerator.DbSchemaEjbGenerator.generatePkField(DbSchemaEjbGenerator.java:441)
   at org.netbeans.modules.j2ee.persistence.entitygenerator.DbSchemaEjbGenerator.buildCMPSet(DbSchemaEjbGenerator.java:537)
   at org.netbeans.modules.j2ee.persistence.entitygenerator.DbSchemaEjbGenerator.<init>(DbSchemaEjbGenerator.java:111)
   at org.netbeans.modules.j2ee.persistence.wizard.fromdb.RelatedCMPHelper.buildBeans(RelatedCMPHelper.java:332)