为什么生成底片文件不成功?

--- Photoplot outline rectangle not found ... using drawing extents




?Can't open parameter file ... using default values:
???? DEVICE-TYPE??????? GERBER6X00
???? G-CODES??????????? NO
???? STATIONS-PER-WHEEL 24
???? FILM-SIZE????????? 24000 16000
???? COORDINATES??????? ABSOLUTE
???? OUTPUT-UNITS?????? INCHES
???? FORMAT???????????? 5.3
???? ABORT-ON-ERROR???? abort film & continue
???? SUPPRESS-LEAD-ZEROES???? YES
???? SUPPRESS-TRAIL-ZEROES??? NO
???? OPTIMIZE?????????? YES
???? SUPPRESS-EQUAL???? YES
???? SCALE????????????? 1.0



?WARNING: database resolution exceeds the resolution of the
????? output coordinates (see FORMAT in parameter file).
????? Some roundoff of coordinates may occur unless the number
????? of decimal places in the output file is increased.


?ARTWORK Error reading apertures.
每次生成底片时都出现上面信息，请高手赐教。