Thank you for sending the file through to me.
The first problem is that the file is marked as having a character set encoding of ISO 2022 IR 144 - Cyrillic (although I haven't spottend any Cyrillic in the file), which unfortunately isn't listed (in that form) in the released version of pydicom, which OpenREM relies on. It is fixed in the current development version of pydicom, but that hasn't been released yet. I can tell you how to fix that in your local install, but there is another problem too...
For each event, the pulse width, kV and mA has been recorded as a multiple value, one for each pulse. I've not seen this before, but looking at the standard it is completely legal. The OpenREM database is set up to cater for this, but the import routine, display and export isn't!