Forums Recent Posts Forums Land Surveying & re... Strictly Surveying "Cannot open COM po... Notifications Clear all "Cannot open COM port. The port has been opened by another program." Strictly Surveying Last Post by Abih Iman 4 years ago 1 Posts 1 Users 0 Reactions 8 Views RSS Abih Iman (@abih-iman) Posts: 1 Registered Topic starter I'm currently using the Topcon GTS-255. How to fix the problem "Cannot open COM port. The port has been opened by another program." Posted : October 12, 2020 6:24 pm Share: Tweet Share Share
