Originally Posted by barbara ann
Thanks for tying to help. Still no luck. Same error message came up after downloading and trying to run the exe file from your link. Hmmm... must be something on my end. It's not related to an anti-virus program or permissions, etc. I will have to study this one. It certainly acts like the file is corrupt. I wonder if anyone has had any luck with those download sites in the last few days....
I just downloaded from the link above on a computer that has never had OpenCPN
and it worked just fine. It is possible that anti-virus is at work or that you have a virus. The latter seems plausible. Some virus software
will try to attach itself to the end of a .exe file hoping no one will notice. The NSIS installer checks to see if the file is "intact" and this check might be an indication of a virus. But it's really hard to tell from here.