System information

2.2 ED Error Conditions
On error conditions, ED prints the message BREAK X AT C where X is one of the error
indicators shown in Table 2-4.
Table 2-4. Error Message Symbols
Symbol Meaning
? Unrecognized command.
> Memory buffer full (use one of the commands D, K, N, S, or W to remove
characters); F, N, or S strings too long.
# Cannot apply command the number of times specified (for example, in F
command).
O Cannot open LIB file in R command.
If there is a disk error, CP/M displays the following message:
BDOS ERR on d: BAD SECTOR
You can choose to ignore the error by pressing RETURN at the console (in this case, the memory
buffer data should be examined to see if they were incorrectly read), or you can reset the system
with a CTRL-C and reclaim the backup file if it exists. The file can be reclaimed by first typing
the contents of the BAK file to ensure that it contains the proper information. For example, type
the following:
TYPE x.BAK
where x is the file being edited. Then remove the primary file
ERA x.y
and rename the BAK file
REN x.y=x.BAK
The file can then be reedited, starting with the previous version.
2.1 Introduction to ED CP/M Operating System Manual
2-18