Not possible to open file due to SVG size

After trying to open the file for cutting with my K40 machine, I get the following window:
“Cannot determine SVG size. Viewbox missing or Units not set./.n”
Can anybody help me how to correct this? It does not happen with every file.
I appreciate your help. My email is edubarca1946@gmail.com
It is very urgent.
Thanks
EDUARDO

From our FAQ linked at the top of every page:

Keep the discussion Public

Taking a discussion private does not improve the discussion.

The reason to have a forum at all is to share information for everyone. Ask your questions in public posts. Never ask to take questions to private messages. Taking questions to private messages tells all other forum participants that they are not worth learning from your questions.

Please do not ask for email responses on MakerForums; it’s the same as going to private messages as mentioned in the FAQ.

Everyone answering questions here is a volunteer who contributes out of kindness and not as a job.

Please provide the version of K40 Whisperer that you have installed, and what software you used to create the SVG file.