Device dependent errors

-7301

(GTS-GRAL only) UIS driver error in file WINDOW.DAT

-7302

(GTS-GRAL only) UIS driver error: not enough coordinates to open window

-7303

(GTS-GRAL only) UIS driver error: no logical unit is free

Typical 7xxx errors include the inability to open or read Font files, Apollo gks_characteristic files, etc. These are usually due to incorect installation. For example, files may be missing or have the wrong format, windows may have illegal sizes, etc.