Maybe you already ran into the issue that you are using Dynamics AX 4.0 SP1 with SQL Server 2005. You are trying to create a new table in AOT with a column called "external".
You recognize, that during the synchronization of the table with SQL Server the following error messages are shown in the InfoLog:
Error Synchronize Cannot execute a data definition language command on (). The SQL database has issued an error.
Info Synchronize SQL error description: [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near the keyword 'EXTERNAL'.
Info Synchronize SQL statement: CREATE TABLE "DBO".TABLE1 (EXTERNAL NVARCHAR(10) NOT NULL DEFAULT '' ,DATAAREAID NVARCHAR(3) NOT NULL DEFAULT 'dat' ,RECVERSION INT NOT NULL DEFAULT 1 ,RECID BIGINT NOT NULL CHECK (RECID <> 0) )
Error Synchronize Problems during SQL data dictionary synchronization. The operation failed.
Info Synchronize Synchronize failed on 1 table(s)
The reason for this is, that with SQL Server 2005 "external" was introduced as a new keyword (used with "CREATE FUNCTION").
Reserved Keywords (Transact-SQL)http://msdn2.microsoft.com/en-us/library/ms189822.aspx
CREATE FUNCTION (Transact-SQL)http://msdn2.microsoft.com/en-us/library/ms186755.aspx
The solution for this is to rename your column to a different name and not to use "external" as column name anymore.