Problem with CWYW

Can anyone help me please? I have been using CWYW, which has been fine until today… Now instead of showing the reference in the text and in the reference list at the end in the usual format, it is showing some kind of command in both the text and in the reference list at the end. I tried to paste an example here but it appeared in the correct format. It also appears correctly formatted when I have emailed the document. The ‘unformat function’ improves the look but means that I can’t edit the reference and also numbers the reference. Any help will be gratefully appreciated - I’m trying to finish writing up my PhD. Thanks

turn off the field code options in View options in Word.

Thanks. I think I must have accidentally hit alt F9 and turned it on!