Panasonic DMR-E55 Won't Let me Record my own VHS
This is probably caused by an irregular magnetic encoding pattern being generated by the tape itself. If the DVD recorder does not fully recognise the code, it may incorrectly interpret it as copy protected. If there is any tape flutter or there are tape edits, these can contribute to the problem. In addition to this magnetic imprinting can occur on old tapes that have been stored for a number of years without being spooled. basically wrong bits of the tape get magnetised. You can sometimes hear an echo on old tape recordings caused by imprinting.
You could try the following:
1) If available, try using a different video machine to play back and record from.
2) Whatever video machine you use, put your tape in, fully fast forward and rewind a couple of times, then try your recording again. This is particularly important if you haven't used the tape for some time.
3) If it fails again, check to see if it always fails at the same point.
4) If it does, try winding forward a little and then try to resume recording.
5) If you can record it means that a short section of tape is giving a spurious code to your dvd recorder and confusing it.
6) Use a re-recordable dvdrw to make a master. You won't keep wasting discs if the recording stops. You will also be able to produce another dvd from your master and edit it if your recording ends up in a number of segments.
7) Always use the highest quality setting possible when producing a master.
8) If all else fails, if you have a friend with another dvd recorder, maybe try that.