Good work - thanks again!
You're right! I've changed the file extension of the volume and now it works as expected. Thank you very much! By the way, I've noticed some irregularity: When I create a new volume, the "Select file" dialog has following filter: "VeraCrypt Volumes (*.tc)". The windows version has the filter "VeraCrypt Volumes (*.hc)".
Preferences "TrueCrypt Mode" is ignored