After receiving further support, I think I may be having a different issue than you are. Maybe this can still help you. Here’s the trick that Mike from Voltera support shared with me. It may or may not be the solution to your issue but it definitely allowed me to have a successful print with an otherwise poorly rendering Gerber.
- Open the problematic Gerber file in a text editor.
- Perform a find & replace on the following two patterns:
\n is a newline).
- Save the file and reload it in the Voltera app.
Effectively, you want to delete the asterisk and newline between all
2 commands and the start of their subsequent
X commands. I’m told that this was getting incorrectly parsed by the Voltera app.