Hydraflow Storm Sewers - Civil 3d 2015 - File open error

[Anonymous]

Hi, I'm having an issue with Hydraflow from Civil 3D 2015. I can export the .stm file and open it in Storm Sewers, but after saving it the file becomes corrupt and I can't open it with Storm Sewers anymore or even import the .stm back to the Civil 3D.

It's the first time Civil 3D was installed on the PC. No new updates avaiable.

Both errors:

Storm Sewers

"Open File Error

Error Loading ... .stm"

Civil 3D

"Import Storm Sewers Data - Missing Data in File

The file you are trying to import is missing required data.

This .stm file was saved in an earlier version and is missing data required to import. The file should be saved in the latest .stm file format in order to successfully import it."

Both files before and after saving in Storm Sewers attached.

Thanks

[Anonymous]

My bad, wrong attachment on the 1st post.