[Coco] ? OS ERROR

[coco at jechar.ca]

All

I am runing a program in Disk Basic that is giving the error

?OS ERROR IN 236

This is a section of the code


210 OPEN "R",#1,F$
215 OPEN "DW",#2,O$,RL
220 FIELD #2,RL AS OD$
225 RN=1
230 'REPEAT LOOP UNTIL END OF FILE.
235 :INPUT #1,IT$
236 :D$=IT$

The error occurs before the loop occurs the test input file I was using 
was a
basic program saved in ascii format so the lines were ont exceptionally 
long.

Any Ideas what I  may have done wrong.

Charlie