What drive letters have you mounted? You did mount a folder as drive C before running the install, right?

You can always try booting from a mounted hard drive image and then running the install, but that might be tricky. (You'd probably have to mount the CD image using SHSUCDX.)

yes, i mounted drive C 😜

here is my mount section:
mount c .\games\LinksThe
imgmount d .\games\LinksThe\cd\DISK1.img -t cdrom

Imgmount d pathtocue file -t iso

That makes absolutely no difference (just tried it), and I have read several times that as of 0.74 it has been changed to '-t cdrom' rather than '-t iso'.

The installer creates a file on the install target HD as a disk test. The filename is comprised entirely of 0xfe characters that are legal (through function calls) in real DOS, but are considered illegal by DOSBox. The installer appears to work OK if 0xfe is added to the list of allowed characters in the DOS_MakeName() function.

Detective ripsaw strikes again. Is there a build with this enabled, or do I need to start looking into how to compile a custom build.