NewEra Demo code bugs

I've been attempting to learn NewEra and it's pretty hostile going. 'Developing Graphical Apps, chapter 6, Developing a Data Entry Window has (at least) 3 errors. P 6-33 has FUNCTION retrieveErrors(st ixSuperTable) RETURNING VOID and in the code window (right underneath) has FUNCTION retrieveError(ixSuperTable) RETURNING VOID and BOTH are incorrect! The function name is retrieveError and the function prototype is retrieveError(st ixSuperTable) RETURNING VOID. This pair of errors is a real pain to spot. I thought I was doing something really dumb. Page 6-32 has code using the MESSAGEBOX function. This will not work unless you put INCLUDE "ix4gl.4gh" in your window class pre_header area. (in fact, MESSAGEBOX and PROMPTBOX won't work anywhere without this INCLUDE. Why isn't it a default INCLUDE?) I believe that the code on p 6-40 causing the orders detail supertable to be updated on change of a customer is also wrong; doesn't work for me anyway. I took the code from Retrieve that dealt with orders (a function) and called it from the NEXT PREV etc buttons. This works. Now, a question. I can add a row to orders and hit the apply button. All appears OK; the serial number is incremented properly, I can fetch another customer's details, come back and my new data row is still present. However, once I exit the window then re-run it, my inserted row(s) have vanished. Why? This is driving me nuts. So far, out of 7 manuals, the only one that has much on HOW rather than WHY is chapter 6 of the above manual, and it has errors. Yeah, I know about the cookbook code but I'd like some work-through examples that work. Hell, I'm getting further in Delphi and I don't know Pascal (do know C/C++) and have spent maybe 3 hours using Delphi itself. Manual version is 1.0; NewEra version is 1.1. I'm running locally against the Win SE engine with a userid that owns the database and can insert records into the orders table using dbaccess, so the permissions are OK. TIA, Peter Wiley