Error messages can result when using APL primitive (built-in) functions, user-
defined functions, system commands, system variables, or input/output opera-
tions. The following list contains the APL error messages along with some pos-
sible causes for the error condition and a suggested user's response:
Error Message Cause User's Response
ALREADY MARKED The specified file was previously marked. If the file is to be remarked, enter GO.
Note: Any existing data in the files
following the last re-marked file will no
longer be available.
CHARACTER ERROR
DEFN ERROR
DEVICE NOT OPEN
DEVICE TABLE FULL
180
An invalid character was entered.
An invalid request to use the function
definition mode was made:
A V symbol was erroneously used in
a statement.
0 An attempt was made to reopen a
locked function.
An attempt was made to reopen a
function using more than just the
function name.
An attempt was made to open a new
function definition using the name of
a previously defined global variable name.
An invalid edit request was made in
function definition mode.
0 An attempt was made to edit a pen-
dent function.
An attempt was made to read a data file
and the file is not open.
An attempt was made to establish more
than eight variable names to be shared
for tape or printer input/output.
Enter a corrected statement.
If the statement was intended to open or
close a function, the V is valid only in the
beginning and ending positions.
Enter a corrected statement.
Enter a different function name or erase
the global variable.
Enter a valid edit request.
If the suspended function execution can be
terminated, clear the state indicator (see
Chapter 71, then edit the function.
Assign the information required to open the
file to the shared variable.
Retract any unused shared variable names.

Page of SA21-9213-0
Issued 15 September 1975
By TNL: SN21-0247
Error Message Cause User's Response
ERROR eee ddd eee is the error code for an input/output device operation and ddd is the device number.
The device numbers are: 500-printer; 001 -built-in tape unit; 002-auxiliary tape unit.
Following is a list, cause, and user's response for the input/output device error messages:
ERROR 002 ddd Command error. \
(l) 1 ERROR 003ddd
1 ERROR 004 ddd
Tape error.
Tape error.
i
ERROR 005 ddd
' (-) ERROR 006 ddd
The tape cartridge is not inserted in
the indicated tape unit.
An attempt was made to write on a tape
that is file-protected. (The SAFE switch
on the tape cartridge is in the SAFE
position.)
ERROR 007 ddd
ERROR 008 ddd
ERROR 010 ddd
ERROR 011 ddd
ERROR 012 ddd
ERROR 013 ddd
ERROR 014 ddd
Tape read error.
The tape cartridge was probably removed
from the tape unit when data or a work-
space was being written to tape. The
data in the file cannot be used.
Data is to be written to a data file, but
all the space in the file has been used.
An attempt was made to write the active
workspace on tape with a )SAVE
command, but the specified file could
not contain all the information from the
active workspace.
A file number was specified that has
not been marked.
The end of the tape has been reached.
The specified device is not attached.
Device error.
Performing tape operations with an un-
MARKed cartridge will cause error 004.
Otherwise, try the operation again. If the
error occurs a second time, call your ser-
vice representative.
Insert a tape cartridge and try the
operation again.
If you want to write on the tape, turn the
SAFE switch on the tape cartridge off of
the SAFE position.
Use the )PATCH command and Tape
Recovery program (see Chapter 2) to
recover as much data as possible.
Try the operation again. If the error
occurs again, copy the files following the
file that caused the errors onto another
tape. Then use the )MARK command and
re-mark the tape from the file that caused
the error.
Use the )MARK command to format a
larger file and do the operation again.
Use a larger file to save the active
workspace.
Specify the correct file number or use the
)MARK command to mark the tape.
Use another tape cartridge.
Try the operation again. If the error
occurs a second time, call your service
representative.
ERROR 050 ddd The printer has run out of forms. Insert forms in the printer (see Chapter 10).
181