Error on material reporting and will not export csv

[MirraLee]

Morning

I was calculating quantities from roads, and then also the materials and exporting both.

One group of roads would not write out the csv file, and then up popped the error window (see attached screenshots and log file.

Quit the file and InfraWorks would not restart unless there was a whole system restart, this happened twice.

InfraWorks 20.0.25.0 not on 20.1  ~not a fan of the old man C3D interface "just saying" and deadline in two days thus not messing with an upgrade

System Windows 10, 64Bit, Intel i7-8850H @2.60GHz, 32 G ram, Nvidia Quadro P2000

I am worried about the file as I had to redo my work due to a complete crash two weeks ago (will post) and I need this file this week and again in three weeks, it's rather critical.... sigh, always is 😞 

Any help would be very appreciated!

Mirra Lee