I mentioned this problem perhaps a couple of years back but it seems to be a perennial thing. I am a registered user but after any kind of hiccup on my machine the programme goes into shock and when I open it it comes up with an error message, something like 'runtime error 216'.

I have both REGVACR and REGVACZ archived, version 4.02.28, and am now having to use REGVACZ again.

No matter what, with reinstalling registered RegVac or Windows itself, this problem persists over the years!

   It is not RegVac.  Something on your computer is crashing RegVac.
   About a week ago on this discussion board rarrows had the same problem in the thread, "Something Messing RegVac Up" - http://www.regvac.com/forum/b-questions/m-1169998944/.  He figured out that it was a defective Java update.

I found by google that runtime error 216 could be evidence of a trojan, so I checked that first.

The key for me was Runtime error.

I first checked VB runtime It was Okay. It is okay to have older versions as some programs require them. I have 4 versions on my computer. Check for latest version and try reloading older versions.

I next tried Java and found a corrupt download. I had updates for Java on auto.
I deleted the bad update and redownloaded the latest Java. By the way you have to remove old versions manually after successfully installing the new.

Hope this helps.