I see the same issue and had one of these myself last week - I have asked development to look at this for me to see if the fix made last week in the development builds addresses this issue also - I also asked them to send me a VCL file for you from the Dev Builds because I am out of the office this week
The issue that I had was related to Offset Lines being referenced to an alignment somehow causing the issue and that was rectified last week as far as I am told (but not released to you guys yet)
Alan