HI Steve, im still a little lost. Are you saying the problem occurs when overwriting a file which has previously been saved? so for example the following causes the problem to occur?

1. create a file and save it to your d drive
2. edit the file and click on save. - at this stage the error is shown and the file created in step 1 is deleted?

Does this occur if you are saving to another drive other than the D drive?