Hi,
Please open up your default equipment profile and ensure that the option
Use slg2txt.exe is
unchecked. This feature is only required for some (very) old slg files that RM is unable to import natively. Once you have unchecked this option, try to reimport your files again and let me know if the problem is resolved.
To edit your equipment profile, first open up
Global Settings by clicking the circled button on the main toolbar. Move to the
Import/Export tab and click the edit button (circled) next to default equipment. Click the edit button for the required profile (you likely only have one) and then
uncheck the Use slg2txt.exe option.