I have found a resolution to my Problem:
Save in Config DocTemplate Form does not report all problems particularly when editing an RTF file as text template. The way I eventually noticed that an error was being detected (apart from my changes not working) was that Close would prompt to save the document, even though I had already saved it, and then would not Close the form.
My habit was to edit a Save then generate a new Test version therefore didnt twig to any errors except that my world wasnt working.
Also Integrity check does not report actual error, or open the document in Word. This forces a trial and error approach to locate the error. i.e. deleting parts of the document to see when a Save and also Integrity Check works
This was further complicated by the tendency of Word to insert hidden rtf tags into AwareIM tags which required the text to be pasted into a text editor and then copied and pasted back.
ps the error was an extra "." in a tag
Can I Suggest that Save and Close functions report errors they may find??.
Regards
John