The suppressed features are possible cuts that are required on the tube part which are unsuppresed as required.
I update before saving but only if the update is shown to be required.
If I create a form but don't create a rule to call it when i save the part the form disappears.
The attached .png file shows my product info (screen capture)
My work flow is:
a) Create a base feature and specify the parameters I want to be able to change.
b) Create a form.
c) Create a rule.
d) Save the file.
I have attached a screencreen cast. I didn't know if the disappearing rules and forms happened with all parts so I tried with a part from 'scratch' and the rule and form both disappear on save. They are not available when I open the saved file.
The only thing I have not done in the screen cast is create an event trigger which would usually be on the opening of the document. Which, I guess is why I did not receive the call form error message when opening the saved part.
Your help is appreciated, the last thing I want to do is to re-install the software . . .
Thanks
Alan
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Inventor 2020, Windows 10