Corrupt dwf when inventor is visible

[Anonymous]

I'm creating dwf files using the Inventor API usin C#. 

The mode is "custom" since I don't want the model included.

options["Publish_Mode"] = 62723; // custom

When I plot the dwf (exactly like the API example) I get a nice dwf. But when I switch Inventor to visible=false, then the multiple sheet dwf becomes corrupt. 

Sometimes it just crashes Design review on open, sometimes the drawing opens, but ADR crashes when using the application button (and keeps crashing this way until the "recent" list is rid of my corrupt file).

I've reproduced this error on Inventor 2014 and 2015, on multiple machines (different domains even) and on several different files.

[Anonymous · Accepted solution]

Solved.
When having Inventor visible, the process had time to start completely. Not visible meant that inventor started to get instructions to plot DWF before it had loaded completely.
My 2014 installation threw an exception and gave an error, others just continued to load and produce a corrupt DWF.

I just added an while (!app.Ready) loop and that fixed it.