Check for the following:
SYBASE environment variable is not set or points to the wrong directory.
X11 is not configured correctly. If you are running dsedit on a remote host, make sure that X11 clients on the remote host can connect to the X11 server on your own machine. See your X11 documentation for more troubleshooting information. If X11 is not available, use dscp or dscp_dce instead of dsedit.
You tried to run dsedit, but the necessary DCE libraries could not be loaded. dsedit requires shared libraries that are supplied by your DCE installation. Make sure that the directory containing the DCE libraries is in your system’s shared-library search path.