I am trying to open old .dtm files created in 1995 but InRoads says it is an invalid file format. I am using Inroads V8i SelectSeries 2 Version 08.11.07.566. Any help or direction would be appreciated.
Thank you,
Keith
DTM file format was changed in v8i SS1. But with newer version you should be able to open old dtm files. To open modern dtm files with let's say inroads 8.5 you need to save dtm to previous file format (save as/options).