Good news:
The only "error" in your model is that 10-20 is longer than 720-780. You'll probably want to fix that before you ISOGEN to avoid ugly results.
Bad news:
ISOGEN can't parse so much information at the same time. You need to go back to your model and assign "line numbers" to break it up into manageable chunks, and run ISOGEN once for each "line number."
Note: "Line number" need not necessarily reflect what's on the P&ID. Even if the whole thing is one line number, you'll need to split it up as Line No Part 1, 2, 3 etc, for example.
You'll also need to mark up the resultant ISO in some fashion how the individual sections relate to one another.
Edit to add: Generally speaking, you should aim for very precise dimensions in order to run ISOGEN. CAESAR is more forgiving than ISOGEN.
Also note, you should generally avoid the use of the color yellow for coloring your various line numbers, because that's the color of the active element, too.
Attachments
Edited by Michael_Fletcher (07/31/18 10:42 AM)
Edit Reason: As noted.