The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
SYS1505
SYS1505Explanation
There are not enough drive letters available to install a virtual disk.
Action
Determine if drive letters can be made available by modifying the disk
partitions. Use FDISK or delete DEVICE=VDISK statements in the CONFIG.SYS
file.