We have just encountered a software glitch that has us stumped and is going to prove to be a problem.
I was copy and pasting from the background edit screen and when I went to paste in the normal edit screen the machine has "write protected it".

That is everything functions as normal except that it is as if program #100 was written in the 8000-9999 range and can be outputted and read as a sub program, but will not allow it to be edited, deleted or cleared in any way.

(All other programs can be written and deleted in the normal way.)

The big problem is that it has taken a quarter of the machines memory. (Which, by the way, if you know how we can increase it we would be interested)

I have studied the manuals extensively but am none the wiser.

I would very much appreciate any help in this matter.

Many thanks,

Daniel