When we’ve seen this in Acrobat it has always been an error in the file. The error could be caused by
- something the creator did
- email or firewall mangling
- how you saved the file on receipt
What do document properties show for creator and producer? How do you save it on receipt exactly?
He was just opening it straight from an email in outlook (double clicking the file).
Had the user send the trouble file to me and I was able to open it straight away. Seems like only he is having the problem.
Also, he is using Acrobat Standard and I just have Reader DC.
As per the issue description mentioned above, user is unable to open a pdf file as he is getting above mentioned error when opening in Acrobat, is that correct?
As you mentioned, user it opening it straight from an email in outlook by double-clicking the file, try saving it to the local machine first and then open. Does that work?
Also, try clicking "enable all features" on the bar at the top and check if that helps.
You may refer to the the following help document for more info:
Let us know how it goes.