Thanks for your reply
I read through the article but it makes for difficult reading because I've never used geometric networks or any of the connect or disconnect commands.
As I was connecting to an ArcSDE Geodatabase, which of course cannot have any geometric errors corrected, even those created after the upload of data. In fact if you didn't upload any data you can't have created any errors prior to the data creation.
It's one of the negative points of ArcSDE Geodatabases, which has many pluses but when you hit problems like this, you sometimes wonder if this outweighs them. It wouldn't be so bad if complete archives could be exported. Then you could export all the data, clean it and reimport it. Alas you can't do that, which is why problems like this become a much larger issue.
Kind regards
Tim