Opening .dot file raises "could not be opened due to an unspecified error."

[s-celles]

Hello,

I'm trying to open a quite big .dot file and get the following error

could not be opened due to an unspecified error.

How to tackle that?

Kind regards

[timangus]

As you can see the error messages could use some improvement. If you provide me with an example failing file I can take a look...

[timangus]

Please provide an example file, or alternatively I'll close off this issue.