Error on moving Handle - Inroads SS10

Hi ,

I had created a Horizontal offset element from another element. 

I created a fillet from the horizontal offset element to another element.

I have to change a design and i need to extend horizontal offset extents, am trying to click the start/end station handle and trying to extend i get an error as below

Am not sure what this error is about. The file hangs and i have to force close it. 

Any light on the error shall be of great help

Thanks,

Ramanan