Migrating from Access to Oracle - Captured Model did not convert

I'm trying to convert an Access database 2003 to Oracle using SQL Developer. I've worked through the migration process to the point where I need to convert the Captured Model to a Converted Model. The first time I ran that step, the application told me there were some issues with some indexes and didn't convert my captured model. I decided to delete my captured model and rerun the process from the point where I import the .xml file and recreate the captured model. I then tried again to create my Converted Model and again it didn't generate. The Converting Database dialog box tells me that it's 'converting the database' and it's 'transforming identifiers' but it just hangs and does nothing. What did I do wrong and how to I correct my issue so that I can create my Converted Model?
Thank you.

I was able to get past the Capture Model "hang up" business about three weeks ago. (I'm trying to migrate the Access 2003 Northwind db to APEX 3.2/Oracle 10g.) I found a thread in another forum that noted the problem could be due to a memory issue. This particular post referred to an omwb.bat file in a folder omwb. This may have been referring to an earlier version of SQL Developer -- I could not find the bat file. I'm using SQL Developer Version 2.1.1.64.45. I did, although find a sqldeveloper.bat file in my installation path: C:\Software\sqldeveloper_2.1.1.64.45\sqldeveloper\sqldeveloper\bin. In that file there is one very long java command. And at the very start of that command, I changed
from: java -Xmx640M -Xms128M .................
to: java -Xmx1024M -Xms640M ................
In the java documentation (http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/java.html) this notes that changing these parameters effect the size of the initial and maximum memory allocation pool.
So that was pretty great -- that it worked. I am at the point now where I've retrieved it all into APEX but it is all invalid and there are so many issues going on all at once that I need to put the project on hold. There is not very much management patience for something like this that goes on and on. Maybe I'll work on it a bit at night now.
Hope the memory thing helps someone.

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