Repeated Imaging process

Hy - i have some problems with some clients which are not able to create an image - the problem is that these clients trying to create an image -but some local driver problems prevents the client to create a vss copy - they start to copy - but for example after 10 % of imaging they stops - but retries to image after some minutes - this process never end - it would be could if it is possible to have a retry counter - is this possible ?
if only 3 % of about 200 clients trys to image endless we are in big trouble -because the client machines then always under heavy load.

Kind regards

PS: really nice peace of software