InRoads DTM Corrupting

I have been creating DTM files of existing roads and waterways features but occasionally the files corrupt and I can narrow it down to specific features in the file. When I try and use these features it sends a message of internal error; access violation and will force the program to close. Is there a way I can recover these features other than keeping regular backups and is this something that I will have to live with or is this avoidable by doing something different.

I find the features usually corrupt when updating in a profile or similar.

 I've attached a DTM where the corrupt features are:

E CLARKSON AVE
E ELKHORN ST
EXCELSIOR AVE
HOUSTON AVE
and
STATE HWY 43

Any insight or advice would be appreciated.

Regards,
Mick

V08.09.02.16