Hi Tony,
Thank you once again for your help.
I will try and overcome my problem in the manner you suggest and, yes, I will report back on the results.
Apart from being a newbie, I am also a wrinkly with limited computing and practical skills of the type required for making bio diesel and so I am going to need all the help I can get.
I am presently out of methanol and it will be midweek before I can get some more.
I will succeed.
Now would some kind soul tell me how to print out Tony's post. When I attempt to print only the first page of the thread will print out and I have not encountered this problem before.
Thanks.
Drover.